i am one of those people. granted i am unc status at age 22 and i resonate more with the classics. not that bo3 zombies isn't a classic, its just not classic zombies in the same way waw bo1 and a bit of bo2 were.
bo1 zombies has this distinctive charm and grit to it. it's not super dark and gritty but it isn't bright and oversaturated like in cod zombies games from bo3 to on wards. it has this perfect middle ground of action horror.
also the bo1 maps look and play better compared to their zombies chronicles counterparts. zombies chronicles ruined a lot of the atmosphere and gameplay flow with its bo1 zombies maps and i question how bo3 chronicles "replaced" bo1 zombies to some. chronicles doesn't have cotd nor five, nuff said.