LoZ - Enemy attack patterns, specially when they get mildly shmup-like a la Gleeok.
ALttP - The bosses, Moldorm and Helmasaur being some of the highlights, although the rest are mostly good. Haven't played in a while though s I could be forgetting.
LA - Jumping, having power-ups although that's more a neat curiosity than outright good.
OoS - Being partly a LoZ remake.
MM - Goht.
WW - Deku leaf was a nice baby step to integrating verticality. Hyoi pear was neat.
TP - The double clawshots were neat first time I played, although it kinda wears out since it's just puzzle-fodder ultimately.
SS - Vaulting over Moblin shields.
ALBW - Bosses and item gauge.
BotW - Chemistry engine, the weapon system despite a couple annoyances, that one korok trial with wooden gear, some of the physics tricks are neat.