My TK sage is the most fun I've played. In pvp and pve. Their crowd control while still focusing on damage is just great, zipping back and forth in and out of combat with force speed to knock over all enemies with wave then keep them down with force quake, lots of fun to be had with that tactic. I find my self fighting all the mob at once instead of just picking them off one at a time, which is a lot more fun to me.
There is also a sense of real power with the moves, though of course this is largely illusionary but it does great in making you feel like a truly legendary Jedi. I never really got that feeling playing as a Jedi knight.
Only way to know though is to try for your self of course. Have fun