Harangody. Even had a nickname all lined up for him; "Baby Heinsohn." Never thought he was going to be GREAT, but thought he'd be a rotation guy. Ugly-ass shot, looked like he was aiming at a peach basket.
Can't think of too many guys that I thought would be stars who never broke out, but lots and lots and lots of guys that I thought would have solid 12-year careers who fizzled out after a couple. Was a Jumaine Jones guy back in the day. I thought Gomes would carve out more of a career for himself after Boston. Was a big Justin Reed fan, too; excellent defender early on, then it seemed they asked him to become more of an offensive player and his D seemed to trail off.
Oh, and Brandon Hunter (of course) was the New Sir Charles.