Dreamcast collecting is fun. I'm currently trying to pick up all the online games, personally. Maybe one day I'll go for the complete NA set. As far as full console sets go, Dreamcast is probably one of the most attainable. Less than 300 total games and no unicorns that you can't get without selling your car, at least none that I can think of off the top of my head. There are very few that typically even get into three-figure territory if memory serves.