I've pretty much soloed my zerker up to level 84 and thoroughly enjoyed it, so much that it has taken over as my main. Progress has been interrupted of late by my New Halas conjie - which is not quite so easy to solo, despite the tank pet. I played an SK for a long time, but severely lacked AAs.
Solo zerker = pull with bow, AOE, mash to a pulp = fun :)
And when it's an ickle fairy doing the mashing = lots of fun :D