It's a legitimate question I suppose. You see, this has been the reponse from more than one person when I informed them of my vacation plans for this year. A certain notoriety seems to still follow that region of the world following the so called "Troubles" there that lasted from 1969 through 1998. Recent spats would indicate that perhaps they aren't entirely over. But I guess I'll have the oppoortunity to see for myself firsthand as I'm now waiting (and quite bored) in the airport for my departing flight.
But to as to why I chose this part of the world, I would first direct you toward the wonderful sell-job currently being accomplished at the website DiscoverNorthernIreland.com. You could spend a couple of hours on that site planning things to do. Also, a more esoteric reason would be to see Dunluce castle which was pictured on the inner sleeve of the Led Zeppelin album Houses of the Holy and take a few pictures there. Add to it a daytrip to Dublin and it adds up to be the makings of a very good time.
EDIT: Having spent a day here, I must remark as to how calm the city is. The tour bus guide mentioned that according to UN statistics, Belfast is the 2nd safest city in the world behind Tokyo.Don't believe the prejudices of others folks. Go out and see for yourself!