Similar to Ben: except for my first mobile (a Phillips Savvy) and an excruciatingly bad experience with a Sony Ericcson (which I was given when my nephew upgraded), I have always had Nokias (four or five in the last 15 years (okay, I buy my own, and tend not to change until I really want to. My current one is a 5230, my first smartphone. It is true that navigating the Symbian OS is ... well, shall we say long-winded, and the auto-turn control needs resetting every now and again, but otherwise, it is great. Nokia Maps is better than any dedicated satnav I have ever used, and doesn't need a connection to the internet to use it (which Google/Bing maps do, surely). The phone is rugged, drags in a good signal, and is small enough to fit in the same holster (yes, I know, but they are practical and keep the phone protected without filling up a pocket) I used for my previous Nokia 32-something (see, I told you I don't change stuff often!)
I will probably change the phone in the next 12 months, because there are too many useful programs (I hate the word "Apps") for the main OSs that Symbian doesn't have. However, none of the options look good - Android seems to be a tracking program with some functionality as an OS; I have no intention of joining the iCrowd because of the walled garden; and Windows ... well, shall we say that I have yet to be convinced. Where is the decent Linux (proper Linux, that is) phone?