Good for you! I liked to be wowed again and again. I will be wowed with iPad2 and then possibly again with iPad3. You on the other hand can remain content with whatever you currently have or use and keep bitching about why getting iPad2 is not a good idea. Again good for you if you think that is going to make you happy! Remember iPad4 or something better will be around the corner when iPad3 gets released and that will be mind blowing. But all you want to do is wait for something better to come (at least that is what you have been telling yourself).
No you do not have to buy everything latest and the greatest. That should be defined by the purpose of your usage but don’t fool yourself with silly excuses and don’t misguide others.