I must admit, I use GoDaddy pretty much for all registrations. It's not so much the price, but the fact that they're so big, that they're unlikely to go under anytime soon. When a registrar goes belly up through bankruptcy, it can seriously fuck up a large number of people, as was demonstrated when RegisterFly went down with 850,000 domains. Customers were helpless and couldn't even transfer their domains elsewhere because the company ceased operating.
Eventually, I believe GoDaddy stepped in and took control of them.