@Kinkys You asked for the best, not the complete cross-section. I actualy have over 250 studios organised in my porn folder, and many that yet need to be sorted. I've got stuff from virtually enevry studio and genre you've mentioned, plus lots of fisting, toys, pup-play etc, but as I said I merely listed the studios that I will regularly download from without agonising about whether or not it will be worth it.
@ianfontinell With regards to CF and SC, it's very much a case of "If you've seen a few then you've seen them all." I've got a few TIM scenes purely because of the sex, but only keep the ones where therre's an actor I fancy who gets a lot of focus. The beefy, hairy growling types they normally have don't do anything for me, which is why I prefer scenes like the opening scene from Outlaws with the 2 attractive bottoms.
Disruptive, ASG Max and the like can be ok, but I probably skip more scenes than I download. Bel Ami has some very attractive guys, but I find most of them to be boring and same-y. I also think the sets put me off a bit as they're always incredibly bright. I've found that it doesn't matter how ow good the sex might be, if it's fighting against a rubbish story, bad camera work, unenthusiastic moaning and/or any one of a number of other factors it just isn't worth watching. That's why I avoid all the livestreams that people upload from Chaturbate and other such sites, especially the ensembles with 6 or 7 guys laughing with each other while not doing anything to warrant the donations they're getting.
On top of all of that, I find that seeing certain actors in a scene can ruin it for me, even if on-paper you might think they tick all the boxes. I'm thinking of people like Denis Reed, Josh Brady, Jay Tee and many others. Joey Mills has reached the point where every scene is a masterclass in bad acting.