You do have a good point, Laura. I don't even rewatch snippets, most of the time. Though watching L&C music videos has sometimes helped me re-connect. Obviously, I also read a lot of fanfic, and while I have characterization issues with lots of stories, they're usually minor and tend to balance out, overall. I think I've been doing this for so long that I just go by a sort of instinctive sense of what "feels right."
The other thing is, I think, my approach to writing fanfic -- I'm not doing this to replicate what we saw on screen. I'm writing the version I *wish* they'd done <g> and that applies to plots as well as characterization. I also love writing elseworlds, where there's more leeway in interpretations.
I'm always open to a good characterization debate, though, and I seriously consider every comment I get, publicly or privately.
Of course, I'm assuming that people will tell me if I go totally out into left field...
PJ