I've been playing since the summer now, but only recently started using the forums (mainly to search for information at times.) I somehow saw the 2018 Christmas contest when it began and have been undoing the forums inside and out to find the answers to the riddles. It's really fun and I'm discovering a lot of things I didn't know about TOS as I'm forced to read through things I normally wouldn't. Pretty smart tactic.
Also, TOS is the first game I've ever played, I think, where I feel like I'm addicted. I absolutely love it. It's new and fun every time, even though I primarily stay in Classic.