Triples is terrible imo.
I originated in Doubles and VGC format. It requires more skill to predict 2 Pokémon at once and doesn't seem so reliant on team match ups.
I've been playing 6v6 OU Singles since I became a member on this website. I like it, but it relies a lot on a perfect lead and team match ups.
When skilled battlers go against each other in Singles, you just predict switches until someone gets hit hard or OHKOed. It sort of feels like a game of dodgeball, lmfao.