As basses don't (usually) have tremelo bridges, I think string pull angles are aesthetic rather than a real issue (in fact the geometry is such that a sideways pull can be used to make up for a low break angle. I always use a finger poke beyond the nut before being happy with my tuning anyway.
That said, parallel strings do look nicer, although it's not a killer issue for me.
I really, really struggle with droopy tuners though - I like them ideally all parallel to each other, or 90 degrees to the sides of the headstock. If a convex edge means they angle in, they can look a bit crowded, but better than a random angle with no relation to the other aesthetic elements.