Just your class. If you use DF without wearing heavy armor (stuff for MRD/GLD/PLD/WAR only) then you'll be a crappy tank and it'll hurt your group.
You can also sub some of the medium armor in as well (stuff that's limited to the above four plus LNC/DRG).
The thing about me is that apparently it's very hard to tell when I'm drunk. So I feel like I'm walking sideways on a UFO and everyone else sees me doing the robot like a pro.
i have bathed in the blood of many. my life was spent well.
feral druids do it on all fours.
The One True Prophet of Tonkism. http://therewillbebrawl.com/