I don't know if this is deserving of its own thread, but I'd rather go with Taj Gibson than DeMarre Carroll. I think Gibson's accelerated age (he'll essentially be 24 on draft day, and he's a junior!) and inability to put on weight have more than its fair share of detractors, but looking past that in terms of sheer production he's deserving to get drafted at least somewhere in the mid-2nd round. He sharply improved this year, slashing his turnover rates, improving his athletic markers, and increasing his scoring efficiency. He's not terribly quick or freakishly athletic, but he's very long, and has one of the best standing reaches among all PFs, to make up for his merely average size. This really stands out in his athletic markers--he's a really good offensive rebounder, has a high free throw rate, and blocks shots extremely well for a PF, a testament to his long reach.
Simply put, he can make plays without the ball as a low possession PF, whether by scoring off hustle points, getting to the line, or blocking shots, and can be an activity guy of sorts. However, I do think his lack of weight is going to hinder him (just look at Hakim Warrick--he had to shift down to SF because of it, and Gibson doesn't have Warrick's athleticism at all), so his effectiveness would undoubtedly take a dip. He might be a tweener, being overpowered defensively by PFs and not having the shooting ability and ballhandling power of SFs. At that the skinny PF tweener, rather than the undersized strong brute force PF tweener, the latter of which seems to be more en vogue in the league--so that doesn't exactly help his case. But the college production and athletic markers are there, and seem to me to better than Carroll's.