I like my dumb phone.  It's small enough to carry in my pocket and I can make calls.  A lot of my friends that have smart phones usually leave the things lying around because they're too big to be comfortable in their pockets.  I usually have trouble calling them, because their phones aren't close enough to hear the the ring or their batteries are dead from playing Angry Birds.  

That's another thing I like about my phone.  It may have a 5.7" 1080p screen, but it's got a thin surrounding and is very slim so it fits in my shirt (or pants) pockets easily.  My DroidX2 was much thicker with a significantly smaller screen.  Oh yeah, and the battery lasts FAR longer on this phone! 

my iphone 4 is not big - it's actually smaller (thinner) than my old "dumb phone"

*Pfft...* If I wanted all of my devices to interact, I'd get them a room!

 
My buisness absolutely depends on communication.  4 or 5 years ago my company finally started offering reimbursment for employees buying their own phones and using them for company and personnal use.  I had blueberries and androids for years up until I finally switched to the dark side and bought into the iPhone.  Six months later, I bought an iPad; my company reimbursed for both and pays the monthly plan for my service.  Yes....I feel fortunate.  Downside is we have to answer the phone.     But...we basically had to anyway, if expected to keep our jobs. 
 
As Reese has pointed out, now my phone, my pad, and my laptop all seamlessly sinc together at all time.  When I am on show site, I can leave the laptop in the room and carry an iPad and do virtually anything I need to do.  I have even started saving pdf drawings of the projects we work on and can call them up instantly on the iPad and seemlessly zoom in to view details.
 
Many in my building have fought switching to Apple for years, but one by one, I see them converting here where I work.  All of our managers and Project Mangers have gone iPhone.  Why, they just work....they easily connect to what ever network or work envirornment I walk or travel into.  There is no going back for me.
 
On the personnal side of the iPhone and iPad.....I don't mind companies who continue to make music apps that work with either.  They sure are more advanced than the Tom Schultz Rockman I bought 20 years ago, I use them in the same way and at a fraction of the cost.  It will never replace my DAW.  It's a tool to be used as I would a Line 6 Pod, or a Rockman, a Tuner, a pocket camera, etc.  And....its with me all the time.
 
Rain.....I haven't made the leap to a Mac yet......no company reimbursment for that. 

Um, you guys do realize that the Samsungs will also sync with other devices easily if that's desired, right? 

craigb
Um, you guys do realize that the Samsungs will also sync with other devices easily if that's desired, right? 

I don't think the samsung would do facetime or texting from my ipad as if it were my phone.

My mobile is just a burner. No contract and it costs me $100 per year. My daughter's iphone costs me $75 per month. As it stands, only one of us can afford cool tech. I just can't pay the huge Canadian telcomm prices for a device that makes it easier for people to call and ask me to do things. A little privacy and solitude goes a long way.

To me the iPhone is just the right size. Any bigger and it would be too big. I've tried some of those larger smartphones and while it's nice having so much screen estate, I find it a pain to reach up to the top corners with my thumb, especially when you're using it one handed. And I have hands like spades.

I enjoy tripping Siri up....and asking her questions to funny answers.

I agree sharke.  but I do have a reason to have a larger screen - mainly for live music sets.  I put my music on my ipad for playing live!  but I'd rather my phone be small like my iphone is!