I'm a bit conflicted here. On one hand, the Switch is already my favorite game system behind only the SNES and the NES (as of right now). There is just so much frick'n content I love between original titles, remakes/ports and arcade ROMs I can play anywhere.
On the other hand, I don't like choosing a game system that is not finished yet since my top 5 games could obviously change. That, plus the fact that I already know that the Switch is going to win this in the poll makes me want to pick the DS instead. Furthermore, the touch screen revolution was such a blast and I adored the beautiful design and screen of the DS Lite. I bought a total of four DS systems in its life and didn't even own the DSi (the original, a white Lite, a black Lite and finally a Zelda gold Lite).
However, because my single favorite game series, Zelda, left such a bad taste in my mouth on the DS due to the deplorable control method coupled with the fact that the games weren't great anyway, I'll opt to just vote for the Switch since I skipped it in the console thread.
Top 5 Switch games so far:
1. Zelda: Breath of the Wild
2. Mario Kart 8 Deluxe
3. Super Mario Odyssey
4. Zelda: Link's Awakening
5. Metroid Dread