Yeah, Electric Funeral is fucking intense. That one's probably the most significant in terms of actually setting a powerful mood as opposed to merely being catchy, like all the popular ones (War Pigs, Paranoid, Iron Man) are known for. I may have to vote for that one.
I've never really liked War Pigs that much. Usually a long Sabbath song has some sort of tempo change or other dynamics in the middle of it, but that one just drags along at the same pace the whole way through. Kinda bores me to sit through it all.
war pigs is a great song but i've just heard it way too many times in my life. same goes for a lot of sabbath songs. i picked hand of doom because it still kinda freshly listenable for me. damn i was such a huge sabbath fan 15 years ago that i just wrecked them for myself.