I'm pretty self-conscious about certain things, ie; my misshapen stomach, my neck, but on the whole, I know I look damned good for my age, albeit I do work on it a bit and I do plan on having some 'updating' in the near future.
I have done 'body as art' photography for a few years and only earlier this year stopped (although thinking of starting up again). It's a fantastic boost to the ego when photos come out good.
I have some self-imposed rules for my own work, most notably no crotch shots. I think they cheapen the work; while most of my work shows complete nudity, more often than not, it shows nothing more than breasts(and mostly covered by a hand, etc.). It's how the work is done that proves more provocative, not the actual showing of parts.
I've never had a problem undressing/dressing in front of the spouse when times were good except when I was overweight.
Whatever self-image negatives I have I feel stem from the unreal women that are in porn, erotica, etc. They're all the same age, heavily airbrushed, made up(there's even a vid on the net showing a woman getting her crotch 'touched-up' by a make-up artist) and full of silicone/saline. They get their asses bleached, spend inordinate amounts of time in gyms and we're supposed to 'compete' with that?
As for inhibitions, I don't think I have any when it comes down to the getting down.
Although I don't think I'd do it in a roomful of people, that's probably the closest to inhibition as I'd get.