I like it for the flexibility, especially as an add-on to my d4 repertoire to avoid certain lines via move orders and even vs 1...e5 you have a wide choice of options... usually I play g3 setups but I have recently begun appreciating the e3 lines. Just the other day, I had this nice win in the English in a Daily Game:
The opponent had a hard time to untangle their position and their dark-squared bishop was a liability for pretty much the whole game... so yeah, I will (with slight adjustments) return to this line for sure
I'm no professional, but if you are around my level (1200-1300 rapid) consider listening to why I love the English opening, or 1. c4.
#1: It is uncommon.
Chess.com's database lists 1.c4 as happening in around 7% of games. That means that if you know how to play the English, you can gain an advantage on your opponents right out of the first move, because they likely spend their time learning openings against 1.e4 and 1.d4.
#2: It is a solid opening.
Engines like Stockfish say that 1.c4 is just as advantageous as something like 1.e4 and 1.d4. Even Caruana and Hikaru used this move in the Candidates. The fact that you don't have to sacrifice any sort of evaluation to make opponents more unfamiliar is worth it in my eyes.
#3: It avoids common opening traps.
Most people at my level can successfully deal with early queen attacks, but the same can't be said about other traps. Black has a bag full of tricks like the Stafford Gambit or the Englund Gambit, all of which require precise refutations to keep an advantage after accepting. Most of these, however, rely on white playing 1.d4 or 1.e4, which is why the English avoids these traps more often.
#4: It is easy to get a good position out of the English.
The ideal position when playing the English is like this: you fianchetto your bishop on g2, have a knight on c3, have another knight either on e2 or f3, castle, and prepare to push your e and d pawns to break open the center. I personally learned a lot on how to play the English from Chessbrah's English opening speedrun on YouTube.
#5: It can lead to a lot of pressure.
The c-pawn push indirectly attacks the center, making black have to worry about the eventual e and d pawn pushes for the whole opening, made worse by the fact that white is a tempo ahead. Also, after you castle kingside, a common strategy is to attack and inflitrate on the queenside. Since your c-pawn is already there, you only have to push your a and b pawns to attack the queenside, saving time.
Bonus: It is a very flexible opening.
1.c4 can also be used to transpose into other openings, while avoiding certain problematic lines. This is most commonly done by playing d4 at some point.