Yeah, the B7 always made the hairs on my neck stand up, even before I was a musician. Ive written a bunch of tunes with the same chords, but no matter what I do it always ends up sounding like SCOM. The C-B7(I-VII7) change is amazing tho, I try to use it to sound different. Still sounds like Sweet Child tho!

Another one I like is Mick Mars' solo on Too Young To Fall In Love by Motley Crue. I love the Crue.