I love my Charlie Brown tree. I keep it up all the time and just switch it up with seasonally appropriate ornaments.
The cats think it's real.
I don't have the space for a large real one. The BF and I go cut one of those down for his place. It's fun. We haven't done this year yet because he prefers to do it when it feels wintry. I tell him that he'll never cut before Christmas at that rate!