Had a peek and looks like a good profile to me. You have a reasonable amount written about who you are and what you're looking for. As for pictures, just remember, there are thousands of cock pics, genuine people will care more about the person and the head that's on your shoulder ;)
Personally, I would not engage with someone who keeps this (site/lifestyle) as a secret from their partner although I completely appreciate you not lying about being single on your profile. That MAY be one reason you get less responses..but then I know people who find that a non-issue.
Best of luck!!!
Your profiles good mate. Ticked off everything relevant to your interests will help the site do some matching up for you where it can, you're upfront what the score is right there for anyone to read it and give a good account of yourself in the write-up. It's all good mate. I didn't look at grammar amd spelling that hard but nothing obvious leapt out and I tend to pick things like that up, it could be trivial anyways if there so who gives a fuck, noone will care. ;)
Do more socially things, IRL or here, use chat or forum more. Will get you to the IRL stuff much better than firing off random emails and waiting for one to land. Doesn't work like that ever for most blokes so another approach def the way forward. I know you get that, so not patronising you there. ;)
