>Game gives you small achievements or reward boosts (more money or exp) for clearing small conditions tied to your skills (M&L Dream Team, Muramasa the Demon Blade)
>Enemies flying away in any capacity (bonus points for spinning) (Legendary Starfy, Pizza Tower)
>Optional flavor text over mundane events (Dragon Quest V, Pokemon Heartgold)
>Player character with aesthetic changes based on abilities (Megaman, Kirby)
>Can 100% a stage on a single run of it (Pizza Tower, Wario Land 4)
>Subtextual tutorials for mechanics (DKC 2, Crosscode)
>Game allows for sequence breaking (Super Metroid, Zero Mission)
>Score thresholds give you 1UPS (Touhou, Gimmick)
>Fast, non-flashy menu/scene traversing (Bravely Default, Earthbound)