I prefer flip only because you're less apt to accidentally make calls, and don't need to use key locks really, as opposed to regular phones.
With that said, I was with Verizon since about 1996... I had a crappy old phone, I mean a huge old WW2 Walkie Talkie looking phone... People thought I was calling in airstrikes with the thing.
I decided just last year around September to get a new phone... So I went to the Verizon store, and they about messed themselves when they saw how long I'd been with them on the same plan and never upgrading.
They were so in awe of what they considered dedication but I considered laziness, that they upgraded my plan's minutes by a ton, and offered me any phone I wanted for $50, and also to add anyone I wanted to my plan and they could have a phone from a simpler group of phones for free.
So, since my mother never got a cell but I figure she could use one I added her to my plan and she got a nice little regular phone to use... At the same time I got a camera phone (It's a Verizon phone) that works great and was only $50. It was the best phone they had, and I always sort of wanted to have a cam phone for the novelty of it... Especially being on a college campus.
If you've been with your carrier a LONG time with never upgrading, they may give you a great deal like that where you can get a great phone for next to nothing. $50 for a cam phone just was a great birthday present for myself.
My only problem is I can't find an Imperial March ringtone... So I go with "The Good, The Bad, & The Ugly" instead... *shrugs*