First time post here on the forums...my wife and I were down at Universal from December 5-8. During our stay, we were able to get on Hagrid's a total of five times. Once at night and once during the day we got lucky enough to get the front motorbike.
We thought the ride was pretty great and incredibly fun. I don't think I've been on a coaster that was more smooth.
I'm not sure if it beats out Forbidden Journey for my favorite ride, but as far as my favorite coaster, there's no questions that Hagrid's takes my top spot.
Also, even when the queue said 90 or 120 mins, we never actually waited close to the time. The longest was maybe an hour and 15 mins and that was when the wait time was 120 mins. When it was 90, we'd be in line and off the ride in an hour.