Do you care about the problem you’re solving?

YC says there’s no point in looking for “fun” startup ideas because the process is the same throughout

There’s a deep fulfillment that comes from building something people want, but there’s also fulfillment from building something you personally wish existed in the world.

For those who did extremely well building startups in the past, how much did the personal fulfillment weigh into what you ended up building?

Should it be a factor at all?