I'm a huge apple fanboy and bought the first iPhone, iPhone 3G, and iPhone 4 on launch days. I also use a MBP at home.
I am considering moving to Android however...either the Nexus S if it moves to ATT or the Thunderbolt or a new dual core phone when released in Winter/Spring 2011.
The iPhone 4 is amazing, but the OS just feels old to me and I think it's more of wanting a change than not loving the phone. I can only compare it to getting a new car every 3 years...it's not that I don't love my cars, but I get tired of them. Although the iPhone 4 is much better than the first iPhone in a way it still feels like the same phone to me.
On the fence, but with every new Android phone released I keep leaning towards the "dark side".