Sex with every girl is different, and some girls are definitely far more experienced (or just simply 'better') at it than others, but I don't really know if there is any kind of 'rating system' I would use, necessarily. Sometimes sex with somebody is really good, sometimes not so much, but generally it stays within the same 'level' (as no other term comes ot mind at this moment) overall. Sex with Mall Girl might not always be a 10/10, but it would never be worse than an 8/10, for instance.

There isn't anybody that comes to mind who I can routinely remember having boring, lame sex with. There have been girls who were boring, but we never did anything past the first time; and there have been girls who, for one reason or another, the sex just never worked out or was really bad (though I accept full responsibility where it is due); but for the most part I feel that a majority of the sex that I've had has been, for better or worse, pretty spectacular.

I feel rhythm is important, as well as touching, kissing, licking, fondling all over the body as often as possible. I am aware that some women can't get off on simply penetration, and need much more stimulation to get that pleasurable sensation. Friction (or lack thereof) is another incredibly important factor, along with position and all of that jazz. I know it's always awkward talking about sex, especially the mechanics thereof, but I think if one is able to bridge that gap and just say what they're thinking, it will go a long way in improving the lives of both participants. 

I am a little tactless when it comes to my interactions with the ladies at times, as I had an incident with RA recently whereas I thought she was asking me for any critiques or advice on sex, and I mentioned brushing her teeth and cleaning up 'down there' (as I generally love going down on women, but not so much if they're gross), which was a huge blow to her self-esteem (and making me look like a complete asshole). However, it seemed to work out alright as the next time that we did have sex (which was beyond amazing, I must add), kissing her alone was 10x better.