Well Bluetooth and Camera are handy, but I could definitely live without them.
I pretty much only use my phone for calling and texting, but Camera allows me to take quick photos,a nd Bluetooth allows me to get them to my computer, good backgrounds from my computer, and good ringtones from my computer.
The others, I don't really use that much. I have a phone thats about 3 years old, handed down from my mum, and I can't afford a new one. When she gets a new one, I get her old one. It works...