I would rather pay. Your tax liability is always the same amount. If you get something back, it means the government made interest off of that money, money that should have been in your bank account getting interest for you. It might only be like $1 of interest, but it's the principal of the thing. Ideally you want to adjust your exemptions to get as close to $0 as possible.

Past three years I've owed between $10 ~ $40. So right about perfect.