Guild Wars 2

I’ve been considering rolling one but since I’m mostly into dungeons and wvw I wonder if its what I’m looking for to be my main.

They are pretty good, although you have to be flexible with your playstyle, and do things that help the party. Shadow Refuge is amazing for a lot of things, and having access to a repeatable Blast Finisher on Shortbow is very handy.

If you’re a D/D condition spammer though, expect to be fairly useless to your group, for example.

This might interest you:
http://www.guildwars2guru.com/topic/86408-unique-advantages-each-class-brings-to-the-party/

Thief is the highest single target dps when fully buffed, it takes some skill and knowledge of dungeons to be able to play it to max potential due to low hp and medium armor.