Agrees with you on so much here. Gary Oldman was never my Sirius. I want to bang my head against a table every time I see him in that role. No, just... no. I wouldn't say Johnny Depp is really him for me, but I've also never really considered it.

I've yet to find anyone who fits my head cannon for Remus.

Sirius/Charlie is a pairing that I greatly enjoy. I agree about the whole not really having deep seeded feelings and really just in it for the fun hot sex. That's why I'm into it at least. ;)

Switching who gets to be on top is a big yes for me. And what you said about Remus/Sirius totally fits my head cannon! Switching really just makes so much sense for me, and I don't know if that's because it relates to me personally or not. Really though, it just opens up a whole lot more possibilities kink wise.

Older/Younger

My instinct would be to have the older character taking control, topping and being dominant, but I'm a fan of shaking things up a bit too.

Don't know if it's a pairing you'd enjoy or not, but this is something I wrote a few years back and your comment made me think of it.

Don't Believe a Word (http://secretlypadfoot.livejournal.com/tag/pairing%3A%3A%20harry%2Fscorpius)