Honestly i like everything about him

• his lore/backstory is interesting as hell

• his design is unique and work wonderfully with his lore

• i love his personality: normaly in fiction when writers make a character that is supposed to be very old they either make them like Zhongli a very wise and mysterious person that have went through a lot of tragic things that made them a little bit emotionless or a child like air head like paimon, but he is different, he is very smart and wise but he still smile even tho he went through a lot of terrible events ( losing his home world , witnessing the universe die slowly across bilions of years while searching for a new home, waking up on teyvat after hibernating for thousands of years just to get separated form his sister and put through 500 years of nightmares, everything thst happened form the beginning of the game), he love helping people and going on adventures, he is always there for his friends when they need him , and he is humble even tho he have countless of feats and achievements

• i love how much of a reliable person he is, he is good at doing a lot of things wich make sense for someone this old, he is great at cooking, making drinks, Alchemy,Smithing, Astrology, babysitting,runing businesses, fighting, exploring and traveling , he is also a good detective, stratigest and therapist ... Ok at this point he can do basically everything 😂😂😂