I've had similar experiences with clients offering to take photos, some within their paid time, some 'in exchange' and learned my lesson fairly quickly.

1. You have no way of knowing what he does with them afterwards
2. Majority are not suitable for using on a profile

The reason for number 2 is usually that the photo is of the room, with me happening to be in it, bad angles,  chin shadow, files too big to upload and I didn't know how to resize (and with all the other things unsuitable it was such a big job that paying a professional who provides good quality, and finished images ready for up load is so much easier). I also now sometimes take some of my own photos and know to get a plain background, zoom in, how to hold myself so it looks good.

Ahhhh yes, I have this problem too!! It started with one of my regular clients, whose pictures actually turned out quite well. Although from the 40 or so I approved to be "anonymous enough", only 2 or 3 were suitable for profile use; ie, not with his big cock / belly / hairy bum somewhere in them. This then evolved into some weird client jealousy, with even more of my regular clients asking to take photos for me. How could I refuse when they know I let one of my other clients? Plus it is a hell of a good way to spend booking time and create content for my profile. So now I have 2 clients who purposefully bring their camera to every booking and a few others who bring them now and again to shake things up.

I make sure to review all photos before they leave and I delete any I am not happy with, whether it shows any of my face or I just don't like it.
 I have found that one of 2 of my clients get huffy if I don't use any of the photos on my profile though and THAT really gets on my nerves.I can't imagine any potential or existing client would like to see a wrinkly old cock in my mouth, can you??!!

I've just been looking through some prints of some photos a client took a couple of years ago. He'd taken quite a few and was also quite a handful regards over staying, wanting me to go out outside of the paid for hour. As a result I was usually concentrating on watching that the appointment didn't go too far over(he'd really have stayed all afternoon if I hadn't said "Go") and had bunged the photos into a drawer.

I am now sorry I'd not realised how good they were and hadn't asked him for electronic copies, because I could have used them.

I am also sad that because of how stressed he made me feel, I missed the good bits of the 'relationship', and wasn't able to appreciate that at the time.