I am usually something tanky. I don't want to say "Fighter", even if I'll pick that on the poll, because it doesn't fit me as a whole. I'll play pretty much any role so long as my HP is high and I can take a few hits.
I will say, however, that I tend to avoid magic/psionics/any other powers in favour of good old martial ability. With 4th Ed I'm always something Martial related, Warlord being on of my current favorites. I just like being on the front lines, soaking up damage and either helping/saving/healing my team up.