I intend to play a gun-using character in Bloodlines as well (am playing as a Toreador, whose Auspex is quite useful for that if I understand correctly)...but so far haven't used any guns in the Santa Monica part of the game. I did put two points in "unarmed" (because it's useful for feeding), that was enough for the combat in the early part of the game. Have one point in guns from a book I bought, will increase that later on.
I once tried Dragon Age: Origins for a few hours and didn't like it at all due to the combat which seemed confusing to me...I hate it when I can't control all members of my party like I want to...I want total control (like in Baldur's Gate or a tactical dungeon crawler like Dungeon rats), having to rely on scripts sucks. Also didn't find the setting and story interesting. Maybe I will try it again eventually, but my first impression wasn' favorable (also its length is intimidating).