utousucks!!
Window 7.5 may be better in user interface but I bet it doesn't have a wide variety of apps like there is on ios or on android. Talking about user interface, I dont think android phones are that far behind now a days. Hardware wise android devices are getting better every time. Just wait for the HTC Edge. Its suppose to run quad core processor. Right now Samsung Galaxy Nexus and Motorola Droid Razer shoud be pretty impressive lookig at the specification. Android has recently anounced that it will be lot smoother with the launch of Ice Cream Sandwitch OS, which will unify the hardware and software resolving much of the known issues. The rate in which android is devoloping looks very promissing. 
Like you said I havent faced a lot of issues on my phone, even though my phone is not a native android device. I do have force closure issue sometime :P. Buy hey its pretty amazing seeing HD2 running android without much of an issue. By the way can you name the android phones that you've tried so far. May be that will make some sens.