i don't care LOL
Luxury balls are my favourite, least is Premier ball. If I ever breed something special, I'd rather it be in a Ultra Ball or a Luxury ball.
I have no main favourite pokeball, depends on the pokemon I intend to catch with it. Though I can't say I'm a fan of repeat ball. I would like if Kurt's types had a more interesting opening effect.
When breeding do you care about what pokeball is passed down? What's your favorite and least favorite pokeball?