Bryan Singer's X-Men movies never really came together as complete films, and were often flabby and played so low at times that the sheer charisma of the generally excellent casts was the only thing keeping them above water.
But they all had great individual scenes, and portrayed characters' powers in ways that were often thoughtful and interesting. There were times they could be uninspired - they never really got hold of what Storm was capable of, and Cyclops brought nothing new to the party - but the Quicksilver scenes; or Nightcrawler in the White House; or some of the vibrant antics of the Last X-Men On Earth's fight against the sentinels in the Future Past movie, (especially Blink's teleportation holes), were memorable and rewatchable in ways most superhero films just are not.
The Quicksilver thing was so effective they did it all over again in the next movie, even as the scripts twisted themselves into knots to explain why they didn't just use Pietro to save everybody all of the time. And while that run of X-Men films has run its course, and the mutants have some kind of a MCU future ahead of them, the freaky nature of their powers in these original films still lingers.