most proud of, kind of split on this tbh between my latest control meta and the colo meta.
the control meta was the only meta I ever actually updated since the latest vtank changes and it represents a lot of what is possible with vtank now, but the colo meta will always be something special for me. back when I first made it we had no expressions no call/returns not even Any/All commands. and I turned that into something that ran something as complex as colosseum working around the limitations of the meta system at the time. the current unreleased build of colo now only requires 43 lines to operate due to changes made to vtank in the past 6 months. 1/10 of the current version and is only 21kb and has zero routes embedded, for reference my original public colo meta was 984 lines long and was 445kb.
most impressed by, the AutoMake meta by HittingSmoke
while I never actually used it for its intended purpose. the logic he uses in making items inspired a few of the ideas for how I structured my new control meta.