BrickBuilder

Yeah, I would say that a well curated group of pictures is good.  I don't really need to see 25 pictures of your cock or your hole, but if you are advertising as a top or bottom, feel free to include a couple.   I do chuckle when someone advertises as "Top Only" and then shows 20 picture of his hole or positions that would be ascribed to a bottom.  Show the full body...chest, back, ass, legs, etc.  It's nice to be able to see those parts and hopefully they are not photoshopped to the point that its evident in real life that you did it (for example, if you have really bad acne on your back due to steroid use and you smooth over all the pictures on the site, be prepared to be called out in person).
Face and head pictures that are recent are very important to me.  Facial hair and hair in general can sway me to hire or not hire.  If a provider elects not to provide one on the site, I may ask for one.  If he declines, he should be prepared for a litany of questions about facial and head hair, length, look, color, etc.  
I typically always ask "any physical or cosmetic changes from your pictures on line?"   I learned this one when a provider that I saw as very attractive on the site showed up with bright green hair (drapes and carpet) that he had died for a St. Patrick's Day party.  It honestly was not a good look for him and I had to pass.  Shallow maybe...but I did not sign up to hire Lucky the Leprechaun.  
Pictures don't need to be professional...but give it an effort to show off what you are advertising.  It helps in the decision making.
Finally, keep em current.  Some providers have had the same pictures for 8-10 years....(talked about in many places on this site)...or they just keep adding to them (and I have to sort through current body type, hair color, style, facial hair, etc).    If I want a retrospective, I will ask.