My first distributed VCS was Tom Lord's Arch. I may have started early, but it took me a long time to understand distributed version control, thanks in no small part to Tom Lord, lol. GNU.

I'm still using Mercurial whenever I can (including work!). The Tortoisehg GUI is good for doing reviews, and the command line is comfortable.

I grew up on CVS and then Subversion. Played with Bazaar a little, mainly because it could use an SFTP location as the back-end.

And I still avoid Git if I can help it. I would/do figure it out when I have to, but it never feels comfortable. Such is my avoidance that I'm dabbling with Jujutsu although I'll still need to really sit down and read through it some more to grok the way it works.

You might like pijul if you like darcs