Okay, my dumb ass left my keys in the ignition in the on position in my garage (with the door closed so no one could gank the car) cuz i was in a hurry to get out of the car, about 5 hours or 6 hours later i go out to the car and realize my stupidity... the lights on the car were dim and it wouldn't start so i jumped it and let it charge for about 20 mins... do you think the battery will hold the charge? I hope i didn't deep cycle it... it seems to start right back up now, but how BAD is it for the battery? it wasn't completely dead, just drained to the point the car wouldn't start (the starter didn't click)

i don't want to be stranded somewhere cuz my dumb ass forgot to pull the keys out of the ignition...

A lot of it depends on the age of the battery and how many times it's been drained like that. Most likely it'll be fine.