I’m circumcised, and I still have a fantastic time with mine when Mrs Chimp (or anyone, to be honest 
) has a little play with him. Mine was done when I was about 18 ish for medical reasons (too tight), and was probably exacerbated by having no one explain penises to me in any great detail.
No idea if I’ve got a full or half-Nelson, but there’s no foreskin movement at all, so maybe a full one? Either way, I’m quite happy with it all. 
I did read on here about a little cock-sock you can pop on the end to get some sensitivity back, though I haven’t tried it myself. I’ll have a little root around and see if I can dig it out.
Edit: Here it is: