off the top of my head the first two things i thought of were:
the first time i entered the great hollow, made it to the bottom rested at the bonfire, and realized i had to go all the way back up that thing. after that every playthrough i go there after getting warp.
my first invasion. it was in the depths right at the entrance. i was still rocking the drake sword and some non upgraded armor and stupidly distributed stats. they had a shotel with cmw. of course i got owned but i could just not believe how much it got my heart pounding compared to other multiplayer games.
the first time i entered the great hollow, made it to the bottom rested at the bonfire, and realized i had to go all the way back up that thing. after that every playthrough i go there after getting warp.
my first invasion. it was in the depths right at the entrance. i was still rocking the drake sword and some non upgraded armor and stupidly distributed stats. they had a shotel with cmw. of course i got owned but i could just not believe how much it got my heart pounding compared to other multiplayer games.