I played solely as VS until BR ~25 and haven't played much since. I liked the purple and alien technology background that they had.
The vehicle combat from what I understand now is very grindy/p2win and the infantry combat got a bit stale but it was good fun for a while.
Go medic, find a massive biolab fight, get certs for days. Grindy yes, but not p2w. Infantry fights are fun as long as you have someone to play with, solo i imagine it getting stale pretty fast.
Flying was glorious back when the game was new.
Racking up hundreds and hundreds of kills and certs, was so damn easy and fun!
100:2 KD was easily possible even on my shitty pc with lags and stuff. Tryhards like Daddy who alt-f4'd before dying in dogfight got even better stats
And now, atleast from my experience, when you find someone up in the air and engage in a dogfight they will shit on you because people who are flying now have thousands of hours of experience..