This was a weekday night block that aired at 10pm, hence the block's name. So, basically it would be two half hour shows (some animated, some live-action). According to Wikipedia, the block aired "from 1996 to around 2008." The only show I specifically remember being part of the block was "Daria." Wikipedia lists a bunch of shows that aired in the 10 Spot, a few of which I watched and a ton of others in which I had no interest (mainly these were the live-action shows). I wish I could say for sure that I watched some of these shows in the 10 Spot as opposed to some other time, and I probably did, but... you never know. Cable schedules are weird, and stuff. But let's just say I watched these shows in the block. And heck, I'll even list some things that aren't listed on Wikipedia. Wikis aren't infallible, they miss some things. I'm also fallible, so it's possible both Wikipedia and I are forgetting some things I might have watched in the 10 spot. (There are, of course, various MTV shows I watched at least a bit of that definitely didn't air in the 10 spot. Probably.)
Apt. 2F (1997)
Daria (1997-2002)
Celebrity Deathmatch (1998-2002)
Downtown (1999)
Spy Groove (2000)
Undergrads (2001)
Clone High USA (2002-2003)
Spider-Man: The New Animated Series (2003)