I just started playing casually earlier this year and I'm about 13-15k on DGS. I really liked the players on KGS, but it's hard for me to find an hour or two of totally uninterrupted time. DGS is so perfect for the slow pace I like to play that I wrote an iPhone client for it: http://dgs.uberweiss.net

When I started playing, it was frustrating and confusing. Now, it's still frustrating and confusing, but it's also so much fun.