I gotta say I'm not one of those people that favourite everything and go round in the forums and leave comments everywhere because my dA is more a place for me to keep all my favourite photos, go back and look and when someone else takes interest, it's very flattering.
But yeah, if I don't comment or favourite you back, don't be offended, I just don't do it because I'm hopeless at it (Plus I'm on dial-up, slow dial-up at that) and it's just not the kind of thing I do. Ok and I am lazy, but again with the dial-up thing, if I had faster internet I would put in the time.