The preferred device and platform could be asked (Windows, macOS, Linux, iOS, stock Android, de-Googled Android...), then whether you need a dedicated app, or if you can/intend to use a browser. If you only ever use an iPhone, and you absolutely need a dedicated app, then everything is out that can't be used through an iOS app.
Text formatting?
( ) Yes → Mastodon is out
( ) No → only Mastodon + forks without Markdown
( ) Don't care → no influence
Similar with quotes. Similar with maximum length for your own posts.
Like Japanese culture/anime/manga?
( ) No → MissKey as a whole is out; same goes for instances with an otaku/weeaboo focus elsewhere
And so forth.
Maybe there could be a question if you may be interested in an instance for people in your town/city/area, but only if not all projects that have local/regional instances are already out. The questions where you live would only go on for as long as it still makes sense. If you've already ruled Mastodon out, and all local/regional instances on your continent are on Mastodon, then there won't be a question in which country you live, etc.
In fact, the first question should be what you want to replace in the first place. It isn't always Twitter, so the solution can't always be Mastodon.