I had a 3GS and switched to Android once it became better than iOS. (Gingerbread onwards)
and I just sold my iPad to switch to a new Nexus 7. I can't take using iOS anymore, 7 doesn't improve enough as I was running the beta of that; notifications still suck, and so does having no widgets.
some of you have very strong opinions on this type of thing.
i have iOS on my iphone 4 and i have a lenova android tablet and find both are really pretty great. both have pro's and con's. but i do enjoy using both.
i've never been a binary kind of its either amazing!! or shit! kind of guy. i don't really get it.