backpacking through europe

[xlivingfor1x]

i got the idea from qwick.

im going backpacking next summer. im going with 3 good friends and we are starting in denmark. i have been to plenty of sites and stuff, so i already know what to bring and about how much i need to save.

what i wanted to know is, of peoples experiences from when they have gone. hostels vs hotels, is camping a good idea? what are some underrated cities that i must visit. i mean i know the usual, venice, amsterdam, paris, etc. we have chosen to not have a set schedule of where we are going or how long we will be there once we get wherever we are going but it would be a good idea to know of some places that i have to go at least once while im there.

examples of pubs, clubs, and hostels would be great. thanks

edit: does anyone know of where i can get discounts on a good backpack and some other traveling stuff?

also, does anyone know of anywhere to get the best plane tickets? i have done lots of research and have looked all over and feel that i am pretty prepared, but any help would be great.