I sometimes look at the Best Nodes and Worst Nodes, and i have the feeling that in particular the nodes of the year seem rather static.

I would like to ask you what your favorite top nodes are (and why) What did you learn from it, how did it solve a problem etc.

I'm sure it came up before, but i'm curious to see what the status is on this moment, and if you have another opinion then the 'statistics'

Update Thanks all for the answers, reason why i asked it, is that i wanted to know WHAT people like in a node WHY.
I Serious am going to read the nodes you to told me here (Saturn and bians guide i've read), and i believe you gain excellent knowledge of former posts (that might not be well known like the top-list, though the both i read are.)

"We all agree on the necessity of compromise. We just can't agree on when it's necessary to compromise." - Larry Wall.