You're probably aware of the new Create account and Login forms using the mw-ui "Agora" styles for a compact vertically-stacked form. They will soon be the default across all wikis. Meanwhile the Echo, Getting Started, and Guided Tour extensions are using the Agora button styles.
Many other forms use the HTMLForm framework, which defaults to a tabular layout. I added an option to display in 'vform' mode to this in https://gerrit.wikimedia.org/r/#/c/65346/ , and on machine toro, I made this the default. So:
* http://toro.wmflabs.org/wiki/Special:PasswordReset * http://toro.wmflabs.org/wiki/Special:Redirect * http://toro.wmflabs.org/wiki/Special:EditWatchlist etc. You can append ?useNew=table to compare with the old appearance. Even user preferences changes but that's not ready for a compact vertical form (and may never be), so again you can go back to the old appearance with http://toro.wmflabs.org/wiki/Special:Preferences?useNew=table .
There's design work to do to improve the look: the ruled wrapper legend around some forms, the error feedback after submission, etc.; I have a list in https://www.mediawiki.org/wiki/Agora/Engineering#HTMLForm_issues . But your feedback is welcome. It's not "my" design or Munaf's, it's WMF's. Thanks to Munaf's use of Compass and Sass, it's even kinda fun to work on.
Regards, -- =S Page software engineer on E3