Regarding the crap towns vote, you missed out Sunderland. You really should visit it considering it was voted third crappest town in the UK. The best time to visit is when there's a home game against Newcastle on. Here's a few pictures of the aftermath of a previous game so you know what to expect.
...
I'd vote for Swindon: when your prime attraction is a
roundabout, you know you're fucked.