I just went to 9.5 PRS strings on the Custom 24. It's had 9s on it for a couple years, and while butter, they were just too slinky. I never thought I'd say that. But playing 9.5s on the NF3 convinced me that the 9s are just too slinky for me.
I did this last night and it took a while because it got it's annual polish, fret polish, fingerboard clean and oil, etc. But I played them for about an hour afterwards and it was simply awesome!!! MUCH better. And, after all this talk about other brands, and so forth, I looked closely at the package. Nickle Wound. That would explain why I've always thought they were smoother rounder sounding strings. For more metal, I'll try different strings.
Also, I had the C22 LTD semi out the other night. I have 9.5s on it now. But I really think I'm going back to 10s on that guitar. Even 9.5s are just super slinky feeling. Oh, they play fantastically well. I could leave them forever and be happy. But I think that guitar may just want the 10s.
Lastly, after seeing the Chapman video, I'm going to start trying other string types again. Back in the day, I put EB Slinkys on my Ibanez Artist (my "do everything" guitar), Dean Markleys on my Kramer Baretta (rock!) and EB Nickel wound on my Strat to tame the bright nature of it a bit. I think it's time to try some of these new formulas. My most immediate interest is in the "balanced tension" sets. The difference in tensions of one string to the next has always bugged me. If they really have found a way to balance that out without sacrifice elsewhere, I think I'd really dig that!