Snuggle

The 5-year-old coming in to snuggle with you = heartwarming and endearing.

The 5-year-old coming in to snuggle with you at 3:00 a.m. and then proceeding to flop like a fish next to you for the next 20 minutes so you can't fall back to sleep and then, when there's absolutely no chance you'll fall asleep again, gets up and states loudly, "I'm done snuggling with you," before leaving you to lay there and stare at the ceiling for the next 3.5 hours until you finally fall asleep just minutes before your alarm goes off and then you crawl out of bed to get ready for work all grumpy and with bags under your eyes = not nearly as heartwarming and endearing.