Asfas1000 got a good point: fast transfers in and out. Assuming all the other points should be quite obvious, because a registrar with no safety, no support and hard to understand, as long as high prices, would never be appetible.
But the only thing i appreciate on GoDaddy is how fast is transferring out the domains. All the other registrars i'm using (especially Name.com) requires 3-5 days to complete a transfer, and they don't offer the chance to speed up the process, while on GoDaddy you can either choose to wait those days or approve the transfer within the control panel.