Here are a couple more couples...because I am a huge shipper, so I love me some romantic/angsty/whatever fics.

Munch/Casey---SVU
Elliot/Casey or Elliot/Olivia (I also like Elliot/new character that we don't know)---SVU
Eowyn(sp?) and Aragorn---LotR

I know this isn't in your list of fandoms you would write, but I thought I would request it anyways, as something different- Will/Grace (friendship fic, because, well, Grace is a girl and Will likes boys

I don't really watch any of the other shows in an extent where I can suggest anything!