I would love it to remember my last 50 people. (Projects too!)

Oh, so you're typing as fast as you can and immediately tabbing out of the field (in less than a second)?

Yep!

It would be nice if there were a tooltip or hint or something to help people discover "3 months ago".

On this site, in the user field, I can type my whole username "liza" and hit tab/enter before the typeahead comes up. I run into this a lot in the project field in our installation, too. If the next name is similar to mine, e.g. "lisa" (or on this site "lizarc"), they'll probably appear within 1-2 characters, but if it's totally different, e.g. "angie", then I can still type at least 4-5 characters before the typeahead appears.

Yep, I think it's from an old list. :-( Sorry.

I can't tell if it's covered by that T5791, I haven't read it closely yet.