I got my first smart phone a few months ago. Despite definitely not being a fan of Apple's business practices, what I (somewhat grudgingly) ended up buying after doing some rather thorough research was an iPhone 5.
My reasons were relatively simple -- In reading many, many reviews it seemed that the overwhelming consensus was that the iPhones were the best built smart phones and the easiest for beginners to use. I really did like the bigger screens of the Samsungs, but the devices felt so flimsy compared to iPhones. And sturdy has always been a factor for me in all my "dumb" cell phone purchases. I also liked the fact that if I had a problem with the device I could go to an Apple store and have it looked at.
In reading so many reviews, the only smart phones that a majority of people really seemed unhappy with were the Droids. Someone will now likely come along and post about how much they love Droids. I'm just saying what my impression was after reading many, many reviews. But do keep in mind that people are more apt to post negative reviews than positive ones.
So far I haven't regretted my iPhone purchase. The phone is sturdy and performs flawlessly. Learning to use it wasn't difficult, although I do have two kids here who are fluent in Apple who gave me some minimal assistance. Although I'm certainly not in love with the iTunes/app store, it's not as horrendous to deal with as I feared.