Your guys liked to play together during the middle of the night, so that's totally understandable. These guys never went through that stage--their time as strays was all the excitement they wanted for the rest of their lives. Milli was the same. Saki was always playful and curious, but not in a making trouble way, but my first kitty Stormie was a jumper and climber and used to climb me when she wanted attention. She was a loving handful.