Another ‘happy hooker’ checking in here. And I have to say, as usual, this thread is a depressing read. So much hyperbole and misinformation (and a hefty dose of insults from a few PP…) Honestly, the way some women on MN speak about escorts is worse than what any punters say about us. Only here have I ever seen us referred to as ‘a collection of orifices’ ffs.
Anyway, to answer the OP – there’s a huge variety in clients.
My own clients range from age 19 – 90. Quite a few are disabled or elderly. A lot of them are in self-employment and trades, though I think client occupation is very area specific; I’d likely get more businessmen in the South East.
About 70% of them are married or in a relationship. Of those who are married, many of them tell me the sex has dried up at home but that they love their wife and would rather see a professional than have a potentially catastrophic and life-ruining affair.
I’ve seen men of all shapes and sizes, ethnicities and social backgrounds. All different kinds of personalities, religious beliefs, political views and careers.
The only thing they all have in common is fancying the knickers off me enough to pay me £150+ for an hour of my time 
They all visit for a variety of reasons: good sex, good bjs, a decent massage with a happy ending, some companionship, a cuddle and a kiss, a chat and a coffee, and simply just being close to a woman.
Many of them are very lonely men indeed.
On the whole, they’re certainly not the monsters that some people on this thread make them out to be.
Are some of them arseholes? Sure, but not any more than in any other section of society.