I think his greed would be my answer as it is the reason we see all of his other traits, but another one I quite like is his stubbornness. When it comes to Mario platformers, I refuse to believe the concept of 1-Ups is canon, seeing them purely...
The only thing that disappointed me in WL2+3 is that you cant view the treasure up close, but I get why and the limitations. I always loved these descriptions they give in WMoD & Shake It!
Honestly, I've always loved collecting these trinkets in levels, especially when they've got funny designs and descriptions that fit the feel of the franchise to a tee. For example, some of my favourite Wario Land: Shake It treasures include...
I always preferred when Wario is portrayed as stronger and more brutish, and yet greedy at the same time, if I said my thoughts it would just repeat what has been said. Wario Land games always felt best to me whenever it felt like a seperate...
Very much greed.
The biggest thing that sets Wario apart from Mario even more than his more thuggish traits, is that Mario is very reactive. His stories are driven by wanting to help others in any given situation.
Wario meanwhile is entirely...
Hmm, his greed feels like the most obvious choice. He's obsessed with gold, money and treasure, and that's a key trait in every game and series he's appeared in.
His strength and brutishness is up there, though moreso in Wario Land than...
Wario's atoms are like magnets for each other; he is unable to directly control them but they are powerful enough to seek each other out upon breaking up, connecting and contorting to form the ultimate lifeform... Wario.
Maybe he can control his electrons to alter the electric charges of his particles to attract and repulse themselves on command. That also means he could probably produce electricity out of thin air.
Also you can't just say perchance.
I wouldn't think so, I'm hoping for at least a remix but that comes once in a blue moon. Who knows? If there is maybe we're closer to that new Wario Land!
If Wario gets split in half like in WL3 and gets back together, can he control his atoms? Does this make him the most powerful fictional character mayhaps? Perchance...