I felt exactly the same way, and got along quite nicely with a (click →)
Motorola V551 for years — until I got a "deal I couldn't refuse" from my super techno-geek buddy in New Orleans, who actually bought a second one at the local Apple store when the one he had already pre-ordered didn't arrive soon enough! I had just about decided it was time to switch, but that deal tipped the scale.
It's all about what you want. If you want a phone, get a phone. (Even the Moto V551 had more features than I needed in a 'phone'.)
If you want a versatile, hand-held, well integrated digital tool kit with text messaging, email, internet browser, built-in GPS, camera, etc. etc. — oh, and incidentally a 'phone', then go for the smart phone!
There is a bit of a risk, if you opt for the smart phone, that you will soon be asking yourself "how did I ever get along without this gadget?", it tends to grow on you.