My most favorite arrow is Rogue River tapered cedar.
Since it's gotten so difficult to get aluminum arrows locally, I've come to like Carbon Express Terminator Selects.
Right now I'm having a pretty good run with Gold Tip XT's, but haven't tried setting them up with broadheads yet. They're doing well enough - and cedar is getting pretty expensive - that I'm considering trying some Gold Tip Traditionals for my stickbows.
Favorite arrow is directly linked to the equipment I'm using at the moment, and is always subject to change with no advance notice.