I think this is something that you will have to ask yourself for several resasons:
1) Enjoyable is a subjective measure, what I find fun, you may not and vice versa.
2) Your own ethical/moral/religious beliefs will play a major factor here.
Now to answer the quesions:
Have any of you worked for a company dealing with adult/pornographic content? Yes
Did you enjoy it? No
If you haven't would you ever consider (doing it again added to make it more relevant) it? NO!
More details as requested:
It's good to hear from someone who has worked for a company dealing with such content. Would it be possible to clarify in your post how the job was and how you felt about it, as well as whether you told family or friends about your work
Did I tell Family or Friends? I never, didn't tell them, I just don't brag about it. I'm an adult I know that my family wont entirely be happy but at the same time, my parents cant ground me and that was before I was married so no problems there.
Now days, I don't like the Porn industry, was never a fan of it, but at the time the job paid well, and I needed the money.
My website states that I/We don't do porn sites, and we don't list the one I did as a reference. If you look at the site my name is not on it, I don't manage the maintenance, I don't have a support contract with them.
Like I said in my initial post it depends on how you fell about these sites, I don't like them, and I think they are a plague of the net so I will not do one again.
Another update for the updated question:
When I hire someone I don't care much about the content of the website as I do the work, If I am trying to hire a designer then I will look at the design not the content, if a developer then I'll look at code. But it should be noted that if its an 'adult' website then I won't look at it so as a designer it would just be a wast of space on the screen/page because it could be the best design in the world but I won't look at it anyway.