So, confession time. ... I'm a bit of a Fandalorian. It kinda caters to the inner Halo fanboy within me since the Mandalorian armor and Boba Fett in particular remind me a bit of the Spartan-IIs and John-117. The jetpack was also something that catered to my childishness that I still kinda hold fondly today. I also was a huge fan of Battlefront II (like, literally got the Legendary medal for every single possible accolade) and Boba Fett was insanely fun to play in BF2.
That being said... yeeaaah, what little I've skimmed of the EU shows that Boba Fett is vastly played up by the fandom. I guess it's just the illusion that, in a universe with Jedi, the Force, impractical double-bladed lightsabers, etc., some people like to believe that all you need to survive is a gun and your wits. To think of it, Han Solo had a quote about this in the Original Trilogy that summed up this mindset quite nicely:
So, yeah, the Mandalorians sometimes reach Mary Sue levels of unbearable... but I can't help but love them.

Not as obsessively as some of the fandom, but they hold a special part of my heart.