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: Mega Man X: Command Mission
Base Breaker: Spider's entire premise. Fans will seem forever divided on whether or not Redips was actually Spider all along, or killed the real Spider halfway through the game and assumed his identity. There is evidence to support both theories, and, seeing as how a sequel to this is rather unlikely to happen any time soon, there may ultimately be no final answers.
Big Lipped Alligator Moment: Hippopressor. It's a giant multicolored hippopotamus that bursts through a wall apropos of nothing at the end of the intro stage. Unlike most animal Mavericks, it does not speak and so cannot offer any explanation for its presence, and it is never spoken of again after the boss fight. Zero sums it up best:
Spider, despite spending a brief amount of time with your party, is also regarded by many players as one of the best members of their teams. YouTube reviewers playing the game would lament at least once that Spider doesn't stick around long enough.
Epileptic Trees: Speculation on to whether Redips was always Spider, or if Redips killed the real Spider and replaced him at one point. There is in-game support for both arguments.