Barbarian - Berserker
Bard - College of Lore
Cleric - Domain of knowledge and life domain
Druid - Circle of the land
Fighter - Battle Master (simply better than champion)
Monk - ?
Paladin - ?
Ranger - ?
Rogue - Thief
Sorcerer - I love every subclass there, if i should pick one - wild magic for fun! unexpected randomness is a lot of fun.
Warlock - ? (but i feel the great old one will fit my playstyle, really want to try subclasses of warlock... in practice not really sure because i need to play)
Wizard - Evocation School... (because i can't normally play school of necromancy with summons and NPC's are annoying.)
I think this will take years before i could say which subclass are 'my favorite'. Every class looks nice and i want to try them all.