T-Mobile MyTouch 4G (white)

Pros: + Fast, Fast, Fast
+ Large 3.8 inch display
+ Freedom of Android OS
+ Seamlessly linked to Google
+ Life time free navigation on Google Maps

Cons: - T-Mobile modified software
- The power button at the top of the phone is not recessed

Summary: I was a loyal G1 user. I had decided to upgrade to either the G1 G2 or the 4G MyTouch. I was scared to go keyboard-less, being used to the slide keyboard. I also felt that somehow I would be abdicating my loyalty to Android if I bought the 4G, so I chose the G2. I realized that the 4G was also Android-based, but without a slide keyboard and a little bit of a different look, I felt more comfortable staying with the G-series. But after a couple of days I was disappointed, mainly because the keyboard flops open on it's own if held upside down. I had read a reviewer say that that shouldn't matter as 'who texts upside down?' but the fact is it is goofy. In my car I set the phone down on the passenger seat upside down when I'm not using it or when I'm using handsfree. So when I go to pick it back up, the keyboard slides out, half-way. Hated it.

I returned the G1 for the MyTouch 4G. After a few days using the on-screen touch keyboard of the 4G, I didn't even miss the slide-out. Besides, the slide-out on the G2 is quite a bit smaller than the G1's and I was not liking it so much- it felt cramped.

The 4G is amazing. It is still Android all the way, but better than the G1 or the G2. It seems to be a more advanced phone, and more intuitive. A lot of the programs and menus are a step up even from the G2. One small example is the Clock- it has a rolling clock feature and animations which are neat. I'm finding more advantages over the G2 the more I use the 4G. Navigating around is a blast. Some people say the screen is clearer or crisper on the G2- to me that seems insane- they both have great looking screens.

Other things I've found that I like:
It seems faster than the G2
And things that the MyTouch has that are not on the G2:
Voice Recorder
The Camera has an instant zoom feature that is easy to use via an on-screen slider.
How about "Sharing Media on your Home Network"? Have not tried it, but it seems neat.
There is a Genius button that is an amazing shortcut.

The main keys across the bottom of the phone are raised- I much prefer that over the G2.

Update after about a month's use:
Fantastic phone. The speed is really good- reboots to desktop in less than five seconds.
Other advantages over the G1- no screen timeout while on phone calls; battery life is WAY stronger. The customization and graphics are sweet, and by the look of the packaging and case that the phone came in, I get the idea that T-Mobile has put a lot more effort into this phone over the G1 and G2.