I guess you can never please all with one tease/settings, because we all have different preferences.
As for the pause between the girls in Tower 1 I don't think they are to long as some have been mentioning. I think they are about perfect in length. I even try to prolong them sometimes by stepping in and out of the elevator repeatedly. It's cheating, but Caprice hasn't caught me yet...
One thing in Tower 1 that I don't think is actually implemented, but kind of have stuck on my mind as "true" when I play anyway, is that it affect the outcome how fast you click Open at the countdown. If you are fast (less rest/pause) I imagine Caprice will increase the probability to be kind to me, but if you wait until the last second, or even worse, let it time out, it will lead to a worse result. Right now I think this is only implemented in my mind, but hint, hint, now it perhaps can get implemented for real also!
And for the pain files, I like the "surprise spikes", they make me jump (literally!). And specially if the session is building up to them, I know they are coming but not when. That anticipation/fear is wonderful!
And talking about personal preferences. I have a thing for girls flipping the middle finger.

Mainly in the tease sessions, like starting out nice and cheerful, but then turning on you. Not that she will start using pain signals, but increasing the intensity, not completing her undressing, verbally humiliating you etc. As with any preference it's not for all, but perhaps one or two girls could go down that route...?