The best collabs happen with people who make your idea better, not people who just nod at it.

Working with somebody who agrees with everything gets you your original idea with extra steps. The useful partner takes the thing seriously enough to push on it, ask what the weak part is, and change your mind about something. That can feel like friction on a day you wanted enthusiasm. It is the difference between having help and having company.

When you choose who to build something with, look at whether they improved the last thing they touched. Ask straight out for the version of their opinion they would give a stranger. Be that person for them too, which mostly means engaging instead of nodding.