RivalPvP is a Randomkits KitPvP server with a big community and a pretty solid place to learn PvP or show off what you can do in fights. If you like fast kit combat, this is the kind of server where you can jump in, practice, and keep improving without things feeling overly complicated.
The kits are balanced and it is not pay to win, so wins come more from how you play than what you buy. You can work your way into better kits by getting kills and by trying to claim KOTH, which gives you something to grind for while still keeping the focus on PvP.
If you are looking for a community-driven PvP server with fair kits and a reason to keep queueing up, RivalPvP is worth a try. Come hang out, fight some players, and see how far you can go.