For me, entertainment primarily means watching movies. I like most genres, especially science-fiction and fantasy, except horror (which for some unknown reason I started disliking since I got children).
I don't watch TV very often, but I tried never to miss any episodes from Star Trek: The Original Series, Star Trek: The Next Generation, Star Trek: Deep Space Nine, Star Trek: Voyager, Star Trek: Enterprise, Stargate: SG-1, Stargate: Atlantis, 'Original' Battlestar Galactica, and the hyper-realistic 'ReImagined' Battlestar Galactica.
As for movie theaters, I prefer going to UGC Mechelen, formerly known as Utopolis Mechelen, because of its relatively small infrastructure (only 12 screens) and high probability to still get a seat only a few minutes before movie start. Also, the VIP cinema room plus adjacent excellent lounge/restaurant is a big plus.
Like most people, I consult the Internet Movie DataBase whenever in need of specific detailed information.