It also kinda starts a bit mellow and boring I'd say - tried it for a while and it didn't do much to keep me interested. I think it's one of those games where you have to keep playing till you get to the truly good parts. (if you're ok with the art that is)
Right now I'm trying "Nothing is forever", and while this one certainly has good writing and keeps me entertained, and I already know I'm only gonna pick skills on affectionate and "humiliate me" from the cunning tree so that I can be dominated the crap out of, it's probably even more of a slowburn than the Big Score! It made me think about chess though and the closest it came to a sex scene so far is it showing me a pretty girls destroy a smug asshole's sicilian defense in a chess tournament final, so I guess there's that!
More seriously, Nothing is Forever seems good both artwise and promising storywise, but you probably have to play it with a decent amount of patience.