As you can see this channel is based on variety. So if you subscribe expect to see randomness (may be from your point of view) pop up every now and then.
I couldn't care less about subscriptions anyway. However, if you take the hassle of one click to do so, I will look on yours and I MAY subscribe back if I like your content. That's how subscriptions are supposed to work, nothing personal.
Outside real life friends, I will think two times before accepting a friend request. If you are so nice to send me a PM along with your request, it's almost guaranteed I'll accept it.