Well while the Hero is majorly customizable with a stock rom us geeks always want more.. its never enough! Custom roms almost always perform faster then stock roms and it just gives us more to tinker with. I was going to root and flash anyways but one of the reasons that made me want to do it even more is to have the ability to save apps to the sd card.
I think it comes down to just being a geek..
I mean if there wasnt any custom roms what would we do with our phones?
Talk on them?? haha NOT!