for me the begiining of the adom is the best
PC is very interesting dungeon for me and playing it is highest fun
(especially if there are altars pools shops in it)
HMV is also interesting (especially if there is many vaults )
but less than pc
Keetrax dungeon is not not interesting (except the final floor)
- but generalli beginning of the adom is superb
wilderness is also superb

COC should be more interesting coz it is not so interesting in my
opinion - it can be even slightly to long and boring in comparison
to PC - i do not know why exactly but i thing it could be improoved

there could be for example alternative more dangerous and shorter way to
dwarftown (there is some alternative in begining of the coc but it is of none
difference one to another) there should be for ex 5 dungeon long shortcut
with some orc town where for example orc players should benefit some bonus
and it could be possibly risky and dangerous - it would be good

also i thing thers should be a 'pile' of quest for special 'classes' only
- only for archer only for farmer - and valuable unique or almost unique
rewards for such players