These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
YMMV: Alex Kidd
Anticlimax Boss: Janken the Great, the Big Bad of the first game, attacks by standing perfectly still and spitting easily avoidable fireballs at you. If you stand right next to Janken, then it's actually impossible for him to hit you at all.
It's Short, so It Sucks : One of the main criticisms of Enchanted Castle, which has barely half the stages that Miracle World had. Moreover, the stages in the former aren't really any longer than those of the latter.
Porting Disaster: The Master System version of The Lost Stars suffers from garishly overcolored graphics, and a soundtrack that's flat-out butchered on the Master System's sound chip.note (unless you have a Master System with the optional FM chip, in which case the game plays a remixed soundtrack which is actually pretty good)
Surprisingly Improved Sequel: Shinobi World is pretty universally agreed to be a better game than Enchanted Castle or Hi-Tech World, and some even consider it to be the best game in the entire series.