The way Sam Allardyce has us playing away from home at the moment, none of them!
When we've actually bothered to try and win away games, I've enjoyed many. Best ones are at the smaller clubs though, had a great trip to Peterborough in 93 where there seemed to be more of us than there were Peterborough fans, and thoroughly enjoyed going to Loftus Road a couple of years after that. Even though we lost 3-0 (Perhapsh BECAUSE we lost 3-0), it was the best atmosphere I can remember at a match.
Never been to Blackburn, but had heard good things about it already. After hearing more good things on here, I think that's next on my list of places to go.