Trigun is one of those animes that goes beyond expectations. After watching One Piece and Rurouni Kenshin, I thought I was well acquainted with the typical 'protagonist who doesn't kill', but no character has MASTERED this persona like Vash.
There is a back-and-forth between serious and comical that I find has been perfected in this anime. I was initially under the impression that this was an anime in which no violence or mature content would be shown in any form, and I was under that impression for a LONG time--about half-way through--and then it got deliciously dark... like 85% dark chocolate dark.... mmmm
The main character, Vash, is such a mix of characteristics. Once all sides of him are shown, he is easily one of the most interesting anime characters you will undoubtedly make a connection with.
The 'badass hero moments' were also perfected. SO MANY animes ruin their own hero moments by drawing it with long scenes of dialogue or still frame pictures with nothing happening but noises. Thankfully, Trigun does not do that.
Trigun is an absolute timeless anime.