How many leagues do you follow closely enough to make a pick?

I mostly stick to Argentina and La Liga, because those are the games I actually watch. Every so often I wander into a league I know nothing about just because a match is on, and those picks are basically guesses. How many leagues do you follow closely enough to feel good about a pick?

Eredivisie and the Premier League for me. I watch Feyenoord every week, so at least I know one team properly.