I am on week 4 of my MacBook Pro. Its wonderful. I know very little about the inner workings of computers and don't want to spend my time learning even the simplest of actions (even just partitioning harddrives or running a dual core or whatever it is) or setting up anything. I just want to open the lid and get on with it as a user, and the Mac is providing that effortless experience in a way my Toshiba Satellite Pro, an otherwise fine machine that served me well enough for 5 years, never did.
If you are computer-oriented or enjoy delving into such things (and have the time for it), then likely the ubuntu or linux is worth looking into. Certainly the OP seems to be enjoying himself on that journey. But if you just want to run your applications and not be bothered with the "hiccups" of owning a PC, the Mac is highly recommended. I love the touch pad, especially, the dashboard, the battery life, the speed, etc.