I'm a Sony and Nintendo guy myself, although next gen I may end up getting all three consoles as I'm doing financially well and I like videogames.
Wait, that doesn't answer the question? If I had to pick and choose, Nintendo first for the exclusives, but then again... Sony has a lot of good exclusives, too. It's a really tough choice. Lately I've been doing more gaming on my Switch, and I definitely think Nintendo has the best IPs by a long shot, but Sony gets the good-looking games with it's more powerful hardware specs.
If only Nintendo would release a powerful console once more. I wonder how that would pan out.