The design of Skitch was in many ways pretty bad. It's much better now. However they seem to have removed 90% of the functionality, much of what probably made people (at least me) use Skitch in the first place.

I remember how Phil Libin, CEO of Evernote, raved in a Stanford eCorner speech about how proud he was to have acquired Skitch and how the Skitch founders saw Evernote as the perfect partner to scale their product without interfering. Don't think they're as happy now. Great speech though: http://ecorner.stanford.edu/author/phil_libin