I started dvcs with Darcs but it was too slow despite having a really really good CLI. Then I switched to Git because it was fast and within a week ran into so many sharp corners I had metaphorical blood all over my codebase. After a while I learned the useful subset of Git commands and life got easier with only an occasional sharp corner intruding every few months or so.

Then I discovered Mercurial. The speed was acceptable. The UI was intelligible. And I didn't hit any sharp corners. Life has been way way better ever since.