I am a self-proclaimed Angry Birds addict!
I was all
when I learned a 3rd game was coming out.
All 3 games are unique gameplay and unique features, which I like.
RIO is fun so far, I like it a lot.
I thought it was a bit too easy at the beginning, but a few levels in cured that.
I finished up Smugglers' Den, and have just started Jungle Escape.
I always just complete all the available levels first, then go back through trying to get 3 stars in all the levels.
It takes a while and keeps it interesting, and by the time I do that, there's usually new levels ready to come out.
YES - I own the Mighty Eagle in the original game. So fun!
and YES - the 3 Angry Birds games get their own folder on my iPhone 4.