I've always used Windows. I started with Windows, and I sure will end with it
I've always been a mix of 32-bit and 64-bit. My first Desktop was 32-bit and I had it for 3 years (well it was a shared family PC). Then it broke and I got a personal netbook which was awful, again 32-bit and I had it for 2 years. So that is 5 years of 32-bit, but, during those 5 years my dad got a 64-bit laptop which I used a lot and it's still running all these years later. Now I have a 64-bit laptop.
I have ran into compatibility problems with programs running 64-bit in the past. But not recently.
Thanks!