We've literally never seen a year quite like it, and as fascinating as it was, I sure hope we never do again. And obviously Joplin deserves a mention there as well, having caused probably the most extreme damage I can recall in modern times to a densely populated area. There are so many tornadoes that would've been headline events in most other years that were afterthoughts in 2011.
I've actually thought about doing an article and/or video on that someday, not just for 2011 but sort of looking at lesser-known violent tornadoes throughout history that were overshadowed by other, more notable ones. Certainly no shortage of examples to pick from.