I just can't listen to Jet Airliner. Everytime I hear it, I want to sing Crossroads, since the first riff is a blantent ripoff of it, although I do admit it does change later.
Mine's probably Godzilla by BOC, I love that powerchord riff. I'm Burning For You is really good too. Heart's Crazy On You is possibly the fatest fingerpicking I've ever heard, and deserves props just for that. Of course, there's plenty of other already named, and ones I'm forgetting, but I'm too lazy to think any harder.