Watching interviews of DeMarcus, his attitude reminds me somewhat of Kendrick Perkins, only younger and perhaps a more carefree sense of humor.
DraftExpress lists his "best case" potential as a taller Al Jefferson. If he combines that potential with a mean edge on defense like Perk, he could be a really special player. Indeed, a combination of Big Al and Kendrick Perkins would be an absolute beast.