Nice to get some more stats here. It looks like you've been a member for 3 years, so do you reckon you've managed to move ~5% p.a. via BB?
You obviously have a good eye for pure brandables, and looking at your portfolio you do have a knack for making up brandable names:
brandbucket.com/profile/moniker
From my experience most of my sales have also come from handreg or closeout names, but as you get to higher value names you can rarely pick these up at handreg. Yes, you can make a higher profit %, but raraly a higher absolute profit.
Not saying you cant profit from handregs, but it's harder IMO to build a good portfolio exclusively from reg-fee names. Take a look at MediaPlow and you'll see he goes for 2-word niche brandables, and many of these he's picking up at auction/drop.