Roommates are always awesome, perfect for character to character interaction. There'll be a lot of tension...I'll love it...

Andrej: *returns to room after a full day a class and examines his side of the room from top to bottom* ._. <( . . . ) "My hair brush and horn polish have moved approximately half an inch from where I placed them..."
Roommate: "Huh? It probably moved when I accidentally bumped your tabl-"
Andrej: >:0 <( what. ) "You bumped MY table?! What. the. FUC%" *roars loudly, sink in their bathroom explodes*