I still love mine and thats why I still use it as my main phone. Yeah sure features are lacking compared to the iPhone 4, but at least everytime I look at my 2G, I can say "this is the phone that changed the industry". If it weren't for Apple - Nokia, Sony Ericsson and Motorola (to shame a few) would still be churning out the same brick, bar and slide phones.
Even though it's my current phone. It won't be for long. I'm still waiting for my iPhone 4. The 3G and 3GS were never worthy enough to make a jump for, but the features on the iPhone 4 have been overhauled so much - its actually worthy of getting - so I will. Sure its a bit more fragile, but if you look at my 2G - not a dent or scratch - looks as good as the day I bought it in 2007 cause i'm overly careful, so i'm sure i'll just be the same with the iPhone 4, but at least i'll have new features!