Nemesis at Alton Towers is a good contender, the queue line gives you some great views of the coaster and it really builds up the excitement. I love it at one point in the queue where you can stand right next to the loop(with just a fence to protect you) Its great when a train goes by.
Also surely the DD queue line should get a mention, I love that queue line, I like to think its more of an attraction than an actual queue line, the themeing that went into it was amazing and I was lost for words walking through it.
I also find it funny when people get lost in the queue line(Its True, I have seen it happen, anyone else got a story like this)
I was happly going through the queue line when suddenly, about a group of 10 people went the opposite way, I was puzzled, so asked one person where they were all going, she said that way was a dead end and they couldnt get through, I then explained this was the way through and showed her the way through, It was hilarous, LOL