Orph, from years of supporting mobile products and having seen the debate about usability, cost, and general opinions about which ones "rock" and which ones "suck", my own advice is to go with what you're
comfortable with. If you're used to IOS paradigms and functionality, then you should stick with iPhones. My only advice would be to get the latest model available so as to not get stuck too far behind when the inevitable technological advancement happens.
Can I drill things down further? Yeah, but it would depend on use and situations. If we're just talking general purpose phones, then I strongly suggest that people stick with what they're comfortable with.
That said, I actually urge the teams I design support for to actually have their user bases outright test their comfort levels. In my organization, we loan out devices to our user base, and we encourage them to try models they've not tried before: Blackberry users to iPhone and Android, iPhone users to either of the other, etc., dedicated Motorola Android users to try Samsung and LG, etc. That way, they actually do realistically compare the different models via real world use and end up having a real base of comparison rather than the vagueries of everyone else's opinions.
However, that's not the easiest thing to do for other people. It's not like cell stores will give out loaners. So the next best thing is to go to one of those stores and do some real extended testing with one. Any device can be wiped clean, so it should be no big deal to actually download freeware apps and configure other things (I'd even go so far as to configure my email on a test model, but I'm also damn sure to be the one to wipe it clean afterwards). Hell, make phone calls on it, if you've got a favorite headset to use, bring that along, and make a list of everything you do regularly so that you actually
do it when you've got the phone in hand. And actually
do it, and measure your comfort level with doing those tasks on other phones. You might find that you really do like other models better than your current device.
Whoops, this accidentally got long

. Anyway, I'd counsel sticking with what you're used to, but testing yourself to see if you're more open than you think you are to change. You might be surprised, and even if you're not, at least you will have seen the alternatives for yourself. So just make time and go to a store for some extended testing, even if it's on the order of a half hour or more. I'm hard pressed to see any store denying you that.