behind the baseline on a lower row is my favorite angle if possible you really see how much more dynamic the movement and ballstriking of the pros are! and the sounds of the footwork and ballstriking are amazing

 

I went to Birmingham 2019. I had front row seats to the side, just about level with the baseline.
It was a great view for seeing the player that was on your side, but not so much the other.
The perspective was so that I didn't have to move my neck back and forth too much.
I think maybe behind the baseline and up a bit might be best?

I did really enjoy where I sat though... Naomi was about 4 or 5 metres away when she was getting ready to return.
I also saw Venus, Barty, Sabalenka, Sakkari, Su-wei, Gasparyan, Svitiolina, Pliskova, Goerges. So much fun, but kinda rainy.

Here's a clip of where I made a weird little mash up of all the serves I recorded from where I was sat.
Not the best quality. The video got hella pixelated when I uploaded it to Twitter though.



Another thing I loved about Birmingham is you got a great view of the practice courts:
A little clip I took:

 

I like that spot, on the baseline and a low row if possible (but not ground level), for me it's a good compromise to see the players closely, I like seeing the service motion (good pictures), and it offers a good view on the whole court. I also like being a bit closer to the chair umpire to see the players during change over.

Best is to be able to move of course but every spot has its own advantages, it's a personal preference, like cinemas and concerts.

Sitting behind the baseline is close to watching tv, it allows to fully enjoy the effects on the ball and angles but if you're too low you won't see the other side of the court. On the sides you see the speed of the ball (which is much more impressive than on tv) but the closer to the net, the more tiresome it is for your neck and eyes. So it can be more interesting to be on a higher ground if you choose net level.
Corners also offers a different experience, a bit in between baseline/courtside.

A nice spot also, if you happen to know where it is, is to sit next to the players box/reserved chairs for the coach and family. It's usually well placed and players look at them a lot, walk toward them between services... I accidentaly sat just behind Penneta's coach a long time ago in Roland Garros and it was really cool.

 

Tennis is probably the only sport where the better viewing option is endzones rather than sidelines (to prevent too much head swiveling). I like corners because with the angle you can see lines (at least on your side) and pace better than directly behind the baseline. That is also usually where players/team boxes are, and if you're sitting near them then the player looks your way a lot, which is a fun perk.

But it's all up to personal preference. Sit wherever you feel you can enjoy the match the most. The worst spot, of course, is directly behind the umpire chair. Unless your goal is to get close to players during changeovers and watch them not play tennis.

 

Tennis is probably the only sport where the better viewing option is endzones rather than sidelines (to prevent too much head swiveling). I like corners because with the angle you can see lines (at least on your side) and pace better than directly behind the baseline. That is also usually where players/team boxes are, and if you're sitting near them then the player looks your way a lot, which is a fun perk.

Dmitry Tursunov was sat right next to me. It was me, an empty seat, then him.
Oh and Poots was sitting at the back just above me too.

 

Behind the baseline, not too high not too low. The most expensive seats basically.

 

I was at the CIncy Western-Southern Masters two years ago, 2nd row up from the court, right at the service line, opposite side from the umpire. Yeah, it's a bit of head swiveling but you really get a feel for the power and speed of the game. Not to mention clearly hearing every whine, rant, complaint, grunt, and profanity uttered by the players. You just get so absorbed with the match because it's right there before you, and you are not distracted by the crowd. Remember the infamous Kyrgios blowup that got him suspended for 6 months? Yep, I was there. What a guy - he was getting mad at the ball kids for not getting his towel to him quick enough and it looked as though the ball kids were afraid of him. At any rate, I saw Barty vs Sharapova and Stephens vs Putinseva (Yulia really likes to prattle out there...) among other matches on the center court; also saw Sabalenka and Plisovka in practice, and Halep/Keys/Osaka on matches on other courts. Cincy is a great facility - and being 2 weeks before the US Open, they get a lot of the top players wanting to get in some work before the next Grand Slam. I much prefer going to Cincy in person over the US Open.

I had to pay through the nose to get those tix but I'd do it again.

 

On CC at Eastbourne I like to be behind the baseline about 5 rows back. It's close to the court but high enough to have a good view of the other side. Side on probably gives a better view of the speed and flight of the ball but the constant head turning can be difficult.

I hope you're able to get tickets for this year.

 

Just try to avoid seats near the exits which can have obscured views. The West stand (side view behind umpire's chair) is partly covered so you can avoid sunburn easier. And from the concourse behind it you can sneak a look at Court 1 next door.

 

Behind the players.

 

General rules:

Behind the baseline, higher rather than lower to get the TV perspective.

Non-stadium courts with lateral stands only - go for an upper corner as the least bad option.

Specific to Eastbourne:

Main court behind the baseline. Northern stand is the best.

Of the other courts only Court 1 had seating back when I went there. The others had a few plastic chairs you could move around IIRC, but even while standing you couldn't see shit most of the time anyway, so no point in taking a seat unless you need to rest.

 

Specific to Eastbourne:

Main court behind the baseline. Northern stand is the best.

But aren't you then looking into the sun for half the day?

 

You'll still need sunblock to avoid the dreaded red nose.