Which is easier/better?

Bonding a pair with a single or bonding three singles together? I understand that all bun buns are different but generally speaking, which is better or easier?

EDIT: Omgosh, just noticed the sticky at the top of the page -_- Sorry people! *dopey*

I have experience of both types and I haven't noticed a particular difference in ease, to be honest- whether it's easy or not depends on the bunnies.