I'm extremely helpful, but not on Guru as much as I used to be. I was the former head moderator of the tech support forums here at GW2G and was also head moderator of tech for several years over at the original Guild Wars Guru.
When it comes to computer hardware, I'm one of the better people to ask. When it comes to in depth knowledge about PC hardware details, I'm the best person to ask. When it comes to programming and software, I'm not the guy you want to seek out (either because I hate it, not interested or don't know it) I hold a PhD in nano-electrical physics with a focus on fabrication design and IPD. Additionally, I am working on a second masters in Sociology for no reason other than self motivated satisfaction and a general distaste of my former field.
Feel free to ask any question your heart desires. I generally lean towards nVidia, but I do my very best not to show bias against AMD unless it's warranted. I recommend hardware based on your needs, not my preferences.