For leveling, hunters and warlocks are incredibly easy/simple. You barely have to be awake to quest with them.
For battleground pvp, deathknights and mages are both very tough.
My deathknight does the best dungeon dps of any of my characters.
Druids (#1) and paladins (#2) are the most versatile classes.
All of this (except probably the first line) will likely change with the new expansion.
And by tough, you mean hard to kill, not hard to play. Right? Edited, Jun 13th 2012 1:19pm by PigtailsOfDoom
Guild Wars 2, Crystal Desert server:
Inga Freyasdottir, lvl 40 Norn Mesmer
Deathbringer Kaami, lvl 16 Asura Necromancer
Popina, lvl 15 Asura Elementalist
Althaia Willowbark, lvl 7 Sylvari Engineer
Maeve Amnell, lvl 4 Human Guardian The MMO-Zam's FB group.
Please message me first so I know who you are.