simple things
Just to add to some of the comments above about consistency and ase of use.
The lovely Ivana, in a fit of rebellion, has just taken delivery of a Samsung Galaxy Mini (free from T-Mobile) because her sister had got one!
After getting it set up so that she could actually call people I kept getting asked why everything was so quiet when people called her. On checking I found that the volume was only just above minimum each time - then I noticed why. Unlike the iPhone where the on/off switch it on the top, Samsung have put their's on the right hand edge - just where the thumb falls for a righthanded user. In order to press the button to activate the phone you have to apply pressure to the left hand side of the phone - and guess what is there, immediately under the finger that'sproviding the resistance - yep, the volume down button. So to turn on the phone, she automatically turns down the volume. To turn the phone off - she automatically turns down the volume. At least its conssistent. But it's the same if you try to use the left hand, this ti,e the thumb is on the volume down button.
The other thing that is happening (the rough edges that someone mentioned) is that I keep getting calls on my phone (and so do a lot of her friends) that are unintentional - not trouser incidents, but made while she is actually trying to do something. Today I had one, "Sorry Ivan, I'm trying to find out who called me and everytime I look for missed calls I end up calling someone I didn't mean to." Sometimes it happens sveral times in 2 or 3 minutes.
She's beginning to regret listening to her sister now and not her ever-loving!