For a favorite bass I'm looking for all these aspects in one bass. Comfortable to play, great sound, reliable, cool ,etc.
That is why my Greco Tbird is not my favorite bass. It has a killer sound. But it is not very comfortable to play. The neck is a little chunky.
Or why my Epi Newport is not my favorite. It is comfortable to play, but the sound just doesn't work very well in the bands that I'm in.
That doesn't mean I hate them. Far from it.
But there can be only one No.1 bass.