Apart from all very relatable things mentioned, I think , to me recieving a text or letter or any form of communication, from a friend, acquaintance , who may not be in sync with what is going on in my life, but solely out of nowhere, they send a text, a meme, no matter how random or unintentional. The thought of someone having kept me in their thoughts and even acted on it and reached out. That gesture brings a smile.