Hull University has won the best student union of the year by NUS. It is honestly fantastic, I'm from just outside London and I love Hull.
There are some awful areas admittedly, but, you NEVER have to go them as a student. The avenues area (about a 10 minute walk from the university) has some amazing bars - like PAVE where you can get amazing imported beers and ciders if that's your thing!
To be perfectly honest, if I wasn't a student, I wouldn't like to live in Hull, but, it's a good place to be a student. Cheap and cheerful!
In terms of Nightlife - it's pretty good. In town you have standard night clubs that play ranges of music - Pozition, Sugar and Tokyo are pretty standard. Cheap drinks, play a wide range of music that's popular including cheesy 90's/80's and indie! Pozition also does a rock night every month (I think).
There's a gay club called Fuel which is pretty fun! It's also open till six.
You also have Spiders which is a rock/metal club on saturdays and even if you don't like the music - you'll still have a good time!
Around the main student housing area you have a choice of clubs. Piper is good and does different nights - monday nights are a mix of all music and you've also got weekly indie and 80's nights.
[W]elly is my favourite place but you either love it or hate it! Mainly Indie and rock music but holds a drum and base/dubstep night each month as well as a metal night (mainly) called Wolfpack once a month. In Freshers week they normally give you wristbands which give you free entry on a thursday and saturday for a month!
Fusion is a pretty standard place and you've got numerous bars around the area as well as decent pubs that are reasonably priced.
The only way to really get a feel for Hull is to come and visit. Like I've said, I love it there.