First off, let me start by saying that I am very happy in my marriage. I love my husband dearly. We are compatible in every way outside of the bedroom.
We have been together for about 6 years and I can honestly say that the sex has never been great. There have been random occasions when it has been good, but I can’t seem to get him to harness whatever it was that he did differently those times to use it more often.
The real problem is that he is so passive. His idea of foreplay is to lie next to me, stiff as a board, and reach over to do a bit of fondling. (I hope this isn’t too graphic.) Aside from what seems to be a lack of enthusiasm… his techniques are really lacking. I need a bit more aggression than this. If nothing else, I need more passion.
I lived a very sexually fulfilling life before I met my husband. If there was something that I wanted to try, I’ve tried it. Hell, if there was something that I didn’t necessarily want to try, I’ve probably tried that as well. (haha.) I’ve always been relatively uninhibited in the bedroom and have dated people with similar interests. Needless to say, this has been a real challenge for me.

I have tried talking to my husband. He isn’t so dense that he can’t tell that something is wrong, but he seems clueless as to what it is that I’m asking. He does not understand what I need, and when I try to physically guide him he just seems stiff and confused and mechanical. He doesn’t understand what I’m asking for when I am specific about techniques or things that I’d like him to do, whether I am describing them to him verbally, or showing him physically.
I have also tried other routes to make our sex life more interesting, in hopes that it would give me a little more excitement, and help him to loosen up a little. We have tried pornography, games, toys, lubricants… and they are fun for a while, but I don’t want our sex life to need a crutch.
It has gotten to the point where I am struggling to be physically turned on when he approaches me, and my desire to approach him is diminishing. I am still quite young, and I’m not ready to give up on my sex life (or my marriage!)... but I’ve run out of solutions.

Thank you to anyone that read this entire question, I know it was long. I appreciate any suggestions.