Been in a WarioWare mood lately (as you might tell from my Kat avatar if you're familiar with the series), so I figure I post something here. I am not in the mood to search for any preexisting WarioWare threads, so if there is one, this one can be merged with that one.
First of all, I enjoy what I've played of the series. It's surprisingly fun for a bunch of "microgames" which are a few seconds long each.
It's the characters that keep me coming back. There's Wario himself, of course, but I especially like 9-Volt, Kat, Ana, Ashley. I also like the other characters. Each one has a unique quirk, and a unique theme to their microgames, which helps keep things interesting.
The weakest one, however, is Game & Wario. It's not because it tried something different (which I can respect), but because of the execution. It has some uneveness to it, mainly because it has some of the series' best moments, and it has some of the series' worst as well. The other games I played had a fairly consistent quality, regardless of how different the moments were.
That said, I still found Game & Wario to be a fairly good one, and one of the Wii U games I play extensively.
Any thoughts you wish to post?