I'd say definitely. Once you use OSX, you'll never want to go back to anything else.
Apple prides itself on having intuitive, attractive, and easy to use interfaces, and that's exactly what OSX does well. You won't have to mess around with the "guts" of the system to change its configurations, install or remove programs, or anything of the sort. In short, it's a breeze and a pleasure to use.
This is, by the way, coming from someone who used Windows for 10+ years before buying my Macbook last summer, so I think I'm qualified enough to say that OSX blows Windows anything out of the water. I can't speak for Ubuntu, but every version of Linux I've ever tried has been the exact opposite of OSX - unintuitive, headache-inducing, and just plain godawful.
"'Casual games' are something the 'Game Industry' invented to explain away the Wii success instead of actually listening or looking at what Nintendo did. There is no 'casual strategy' from Nintendo. 'Accessible strategy', yes, but ‘casual gamers’ is just the 'Game Industry''s polite way of saying what they feel: 'retarded gamers'."
-Sean Malstrom
