I know exactly what you mean, it's great when you just find that bass that feels perfect in your hands! I've always found that whenever I've had several basses, there's always one which feels and sounds best, and thus gets used most. This ultimately ends up with me moving the others on.
When I got my black KT5, I really felt like that was as good as it could possibly get for me, so I sold my others and ordered a custom spec KT5. So now I just have the two of them, which makes me happy
Well, I do have a Yamaha BB605 too which I can leave out in the living room without worrying about the kids getting their grubby mitts on it!