I don't really have that many criteria... just that there should be no smut, the writing should be good, and the plot should be interesting. I'll even read a half-finished fic on hiatus if it meets that criteria. But the rarepair one is so true.
The rare one is so true! Just found Moreid and it's like, hmm, might check this out some more... Nope! Nope. Nopety Nope Nope. Do you hear that? It's the sound of me noping!
*2 years later*
"Found another one in easy french"
*Time to learn then*