For me it's talking to myself... Even at work I find myself whispering words to myself that get me to open a word doc and start writing when should be working... Boring office work with lots and lots of numbers....
And it isn't just at work...
My 9 year old cousin might have picked up on my talking to myself and singing to myself in unknown words and now she has her own language too!!! I sort of get what she says even though I don't but it feels too awkward to tell her mom, my aunt yeah actually she's telling you "No, you crazy!"... "Chakka la ne ma nagga..." Or however she really says it...
So as a writer it doesn't bother me but clearly some family and friends think I'm mad, thankfully I know that the day they decide to read my stuff they'll get me! They'll finally understand me!!! My mom does cause she took the time to read some of my stories, though she's not fantasy reader, only romance and drama for her! And yet she read my stories and now whenever Dad or my brother tells me I should stop making weird noises she waves them off!