Well, to each his own...
Some pornstars don't seem to be very attractive to me and/or do actions which I am not a great fan of... It is all I can say: it is up to my personal taste and I have no reason to think they are overrated - they give their effort and make their money hard in the rough world and deserve the respect and the position they've gained.
I don't understand why some stars are belittled for not doing this or that - it's good they have their own way to perform in my opinion.
Furthermore, a lot of stars mentioned in the thread (Krystal Steal, Jenna Jameson, Brianna Banks and, above all, Jill Kelly - to give at least 4 examples) are very beautiful women and I am always very glad to watch them.