i have chronic fatigue and feel this very hard, i can barely hold enough energy for 3 hours of even just thinking at a time. i think that the super long conversations are just done where you just keep playing off each other. my long ones have been discussions about philosiphy, jokes, silly theoreticals, its more about the fun of talking with your friends then the specific topic. i imagine that's what the ladies were doing c:
as for feeling self aware and stuff, i experinced that due to autism, i'd realize my way of communication was very diffrent then others and that combined with instilled feelings from other people in my life as a grew up, that made me feel ashamed of my infodumping. its ok though, you are allowed to be loud and not make eye contact and be excited. i wish you restful time for us the unrested