What annoys me: the expensive to replace batteries on iOS devices. My wife and I have new Samsung Galaxy III S phones and I was giving her a little lecture on recharging strategies for maximizing battery life (same lecture as for our iPads, BTW). Then I checked out how incredibly cheap Samsung replacement batteries are on Amazon. Husband fail, but recovery :-)

So, I asked her to be careful of her iPad recharging strategy, but recharge the III S at will. BTW, both devices seem to have about 10 hours of active use time between charges. Also with the III S's higher resolution screen I have started using it for watching Netflix, TED talks, etc., etc., so the battery life of my iPad may not be an issue.