I have a 2 year old Russian Blue that is an odd little fucker. He like under cover middle of the night naps for one, and won't leave you alone unless you let him under the blanket. I swear to God he thinks he can make himself invisible at times and will creep through the house being naughty, and knocking shit over.
If you call him on it. He will zoom over to where you are, climb up beside you and lay down next to you. He then disengages his cloaking device and pretends to just be waking up. Some dirty fucker chucked his very pregnant mother out of their vehicle a few winters ago during a brutally cold night when we were hitting minus 20.
My Sister rescued the mother and brought her to me. No one new she was knocked up at the time, and I wouldn't know until I picked her up a day or so later. She birthed 6 babies, but only 4 made it. When it came time to give the little ones away, I couldn't bear the loss of the little guy and kept him.
He's mischievous, but not a bad cat.