Is anyone else just really "not into" mainstream porn anymore?

A little background, when I was in my late teens and early 20's I used to love mainstream porn. Then I started watching amateur stuff that real couples were doing with each other and I really haven't looked back.

Last night I watched some mainstream porn again and I noticed a couple of things that were common across all of the movies but just seemed really unnatural. The sex always seemed really really dry, almost as though they kept stopping the sex to wipe off the guy's penis. I can't see how that is in any way desirable, they're probably trying to make the sex look "clean" but it just looked unnecessarily uncomfortable. The second thing was that nobody seemed like they were trying to climax. There was no clit contact for the women, and the guys seemed like they were in marathon mode, just trying to bone for as long as possible while completely suppressing any chance of an orgasm, and then finishing with their hand at the end.

It's strange to me just how much these scenes don't mirror what actual sex between couples is like. I'd expect professionals if anything to be more prepared with things like lube, and know how to get each other off better, but instead it drove home what they actually are; actors. I found it easy to get into, because at first glance they're attractive and have a good setup for the sex. However I found it really hard to get off to, because the sex was.... emotionally flat I guess I'd say.

Anyhow I know that everyone's tastes for porn and arousal are different and I was wondering if this is typical for "older" people (I'm getting close to 40 at this point) and I've just "grown out of it", or if my tastes have simply changed. I mean they have to market this stuff to people, and generally older people have more money, so there has to be a reason it's mainstream right?

Edit: Thank you all for your tremendous responses. I need to step away and get back to daily stuff now, but I just wanted to say this is what I love about SO30. So much of the rest of reddit is arguing, where each person has a "side" they're stubbornly sticking to. This community on the other hand is all about having a conversation and sharing ideas fairly with each other with a positive outlook. These kinds of discussions are what I used to love about the internet and I wanted to thank you all for being as tremendous as you are.

Edit #2: Oh wow, I've never come online to see my inbox say "49" before. It's a little overwhelming but you are all great people so it's cool. I never expected this kind of participation, it was just something I had on my mind before I started work today. Thanks for all the responses, I don't think I'll have time to get to them tonight, but I'll do my best!