I would agree about Blackpool.
I spent a weekend there, at a conference and I thought it was ruddy awful. The trams were nice but the seafront went on for ever, just miles and miles of sheer tat. At night it was even worse.....I don't think I can ever remember stepping over more pavement-pizzas in my whole life. Wild horses would never get me back again.
But that was at the end of May 2005, so I suppose it could have improved since then.