While randomly searching for interesting comic strips in the internet, I found Bill Watterson's Calvin and Hobbes might be a good one to read. I'm much being curious about it's ending though. I remember last few months ago that I saw an ending of that strip and read it on dgemu.com forums. It seems to be sad and realistic but unfortunately it was a fake ending. Fan-made perhaps?
Th real ending was actually positive and more accurate than the pic above. Look at the bottom pic: