I created a few font pairings using my sample bird-related sentence, in Canva. The first one is Gotham and Palatino. The second is Gill Sans and Work Sans, and the third is Segoe Script and Comic Sans (casual). If you were to work on a project with these font pairings, which one would you choose? And are they good, any?

The context of the use would matter as well.

But without knowing that, I can only say that 1 and 2 are fine. There is enough contrast to make the combination work and there is nothing wrong with the individual fonts.

I can’t imagine a use-case for option 3. I wouldn’t really recommend the individual fonts anyway, but the combination (the “double casual”) makes it even worse. ;-)

Possibly also worth mentioning: the text lines need more leading.

Pair number 1 is fine. Pair number 2 is two sans serif typefaces. Moreover, the headline isn't Gill Sans Regular, it's Gill Sans Demi-Bold or Gill Sans Bold. Gill Sans itself is close enough to Work Sans that you might as well just use one or the other for the whole thing, and just bold the headline.

Here it is with all Gill Sans MT: