While I could say I love doing both. It really depends on my mood which is more toward cruising while listening to some music rather than getting technical at a skatepark with my skateboard. People that skateboard that pick on longboarders or vice-versa are just close minded.
I love cruising on a longboard but I feel like I have a connection to both.
The only problem with longboarding is the poser kids who ride around on expensive setups for the image.
I longboard and skateboard, and i hate those kinds of people just as much as the next guy, but they exist in almost every sport. You can find the same types of people who do the same thing with skateboarding, BMX, etc. but you can't group in everyone else who longboards with those kids, because just like skateboarding, theres people who go hard and shred.