I've always felt bad for the people on the east coast who don't have the awesomeness of the Cascades, etc. to go into.
I've gone too many places to count - both backpacking and mountaineering. I will definitely post a bunch of pics and reports soon. (Have to do work right now tho)
However, amongst my favorites:
McClellan Butte
Seven Lakes Basin
The Enchantments
And of Course, Mt. Rainier