I like this one:
http://www.chessbase.com/newsdetail.asp?newsid=8495
Nakamura - Gelfand 2012
It has really interesting elements of positional play, and in two occasions both players "knew better" than what a computer would have suggested.
While being simply another game between two GMs, it taught me and entertained me quite a bit.
If you had to memorize a chess game (of at least 10-15 moves), which would it be and why (instructional, beautiful, etc)? Post it on here if you can.