#1
Okay, basically I'm not actually writing a song, but trying to find a good method of chord progression. I try with power chords, but they're too, "happy," and boring; I want something more agressive and complex! And I'm also an utter guitar nub, so don't really know much about music theory, tried looking into circle of fifths but agin I only know how to make power chords. Any help please?
"Beer is proof that God loves us and wants us to be happy." -Benjamin Franklin
#2
I find you can add a lot of character, by using little hammer ons and pull offs in open chord progressions. e.g. with an Am:

e|-0-1--0------------
B|-1-1--0---------------
G|-2-2--2---------------
D|-2-2--2-----------
A|-0-0--0--------------
E|-------------------------