This is actually the only HQ of my small Blood Angels force, usually i just field him with standard gear and give him powers from the divination discipline. On higher points matches i can upgrade him to epistolary, but then i have to be lucky and roll powers that goes along well together, so usually i stick to the basic. With my current army list he doesn't see much action: he just stays in the back with the tacticals, mans the quad gun and dish out prescience to whoever needs it. For his point cost, i think it's already enough, but i wish we had cheap librarians like Dark Angels got in their last codex to equip him a little better or buy more stuff with the spare points... We'll see when we get a new codex too i guess.
From a fluffy point of view, Brother Willis is a die hard (guessed that?) veteran, even if he's a librarian he's more an action guy than a student, he got his psychic talents very late, when he was already an accomplished warrior with a reputation for survival. On the down side, he's very undisciplined, and he's known to often question orders if he sees them to be unfit or plainly stupid. You can imagine this have gained him a lot of troubles even in a chapter like Blood Angels that's not so strict about rules (well, if he was a Ultramarine, he would have managed to get himself executed or booted for insubordination by now...).
Anyway, this is the first librarian i paint, and i'm quite happy with him, so here come the pic (maybe you can guess why i called him Willis by the way...):
