Mesmer definitely has the best of all classes. It's quickly becoming a favorite of mine. I don't care for the thief pay style and elementalist and engineer sound like hell on my wrist pain. Its one of b the reasons I like warrior so much. It has a simple rotation of skills to maximize it's dps without killing my wrists after typing all day for work. But timing the right skills in pvp can be a bit more challenging than it looks. Of course in pve tho all you need to do is press 1 to win with greatsword. But the new enemies in HoT sound much more difficult than that.
Necro is still fun but frustrating with so little dps and with staff being the only long distance weapon it can be aggravating at times. Basic enemies can take me a minute or 2 to kill but my warrior can just hit 1 twice and kill most things in seconds. If basic necro had more stability and dps is it'd be my favorite class.. and the reaper specialization will do that. Come on expansion. :Do
Necro in gw1 was still superior tho. You had no limit on minions. With enough enemy corpses to exploit you could have an army of over 20 while syphoning hp from them and almost never dieing. That's why I'd love to see gw2 necro minions get upgraded with better ai. If we can't have a swarm of them, at least let them have as good of ai as the new hot enemies.