I don't know what it is, but for whatever reason, November is always a particularly creative month for me. Never really been sure why, exactly, but I've noticed over the years, that November is a month where my creative juices seem to flow more than usual. Like November 2008, for example, is when I developed another one of my puppet sitcom concepts that still never went anyway yet. There are other Novembers in years past where they turned into puppet building months for me, and this year is no exception, as I try to work on building a new Steve D'Monster as well as a new Ella the Elf for a new Christmas sketch next month.
Then again, it's not just November. I've also noticed that February, April, and September are also particularly creative months for me as well.