Are you talking AMOLED or pentile? AMOLED has a distinctive color-cast at low brightness and a color gamut that exceeds the standard which can make it look cartoony, but so do other screens e.g. the iPhones 3 and 4 which have too small a range and can look washed out as a result. The banding sounds like an AMOLED problem too (unless you mean the "stippling" type effect you can see if the pixels are big enough).

But neither of your complaints appears to be related to pentile vs RGB stripe. If you're talking about low pixel density then it's the same Mac OS vs Windows text rendering debate. There's not enough pixels so which kind of ugly do you prefer (or are you used to)? Some people like the hand wrangled pixels, other just let it fall where it lands. Things designed for one system will look worse on the other and especially bad to people who prefer the other look.