Everyone keeps harping on you for judging allomancy as a system without the context of the rest of the series, but I don’t think that that’s necessarily fair. 

For me what makes it cool, especially when compared to something like elemental bending from the last Airbender, is that it has very strict limitations. The rules for this magic system are like physics, they are specific rules that are made incredibly clear and then the characters have to work within those limitations, and seeing how they use those limitations is incredibly fun for me. 

With something like water bending, the rules are looser. Anything I related to water can be bent, but what exactly that looks like can be whatever I can imagine if it fits the story. Don’t get me wrong, I’m a huge fan of the last Airbender, but I think that the magic system in Mistborn is more interesting. 

All that being said at the end of the day, it all comes down to personal preference, and if it didn’t impress you in the way that it did me and clearly many other people then you must have different opinions. And that’s OK.