Honestly a hard choice. I love the ugly ass style of Wario Land 4, and 1-3 have an interesting style themselves. VB is crazy though, they look so high quality. You can really see Wario's muscles in action.
Hey, CM30, I hope things have gotten better for you since last Friday. Life can be a pain, I'm sure you know since you're like twelve years older than me, but you can only go so far down. Hold onto some hope, alright?
Me and a friend during a VC did discuss the idea of them doing a Odyssey or Bananza style game for Wario, which I hope is a genuine possibility. Anything to get Wario some platforming+fighting action.