Frequently. My parents raised me to have an appreciation for it and I was surrounded by quite a bit of it when I was growing up.
Very occasionally, and I'm very selective. I mean, I like a bit of Vivaldi or Holst's planets every now and then, but not very often. My Mum's a violin teacher and I grew up with lots of it but I don't listen to it much any more. Saying that, I like a lot of ambient music, which is pretty much the modern equivalent of classical, and I love it when classical is incorporated into, say a rock track. Muse are a great example for that.
Good to hear. I'd kind of wondered, because I've never seen anyone except me post classical music in this thread.
^ Hey! I like Philip Glass, and that's classical! Weird classical, yes, but there we are. 4' 33" by John Cage.