I had a Blast and it was a great bike. Learned to ride on it and put about 3,000 miles on it...
Really good forum full of helpful people. With a little attention you could make it into a reliable, nicely-handling thumper. Buell's engineering put a lot of cool little things into the bike that you wouldn't expect like awesome brakes, oil-in-frame, belt drive, etc. If you look, you'll often see them for sale cheap and running poorly; at least 50% of these bikes only need a $12 intake "boot" to run perfectly again, so watch Craigslist for one at $900-1200 range and you'll be stoked.
The reason Erik Buell hated them was he was basically forced by Harley to make the Blast for their Riders Edge course; he had little say in their production, but they "stole" lots of his design from the nicer bikes. He considered Buell to be like what AMG is to MB or what Ruf is to Porsche.