I've seen just about all of it in full except for the Ruby/Sapphire & X/Y seasons, as they weren't my cup of tea. Their respective games were my least favorites, but it was the Pokemon designs & Ash's companions that put me off mostly. So I feel ya.
Ok, well, I would suggest you play Sun & Moon, if you can afford to grab a copy. It's REALLY good. Some conventions are changed for the better, & there are a lot of new features that make it feel SO fresh. I had an absolute blast with it. This reminds me though, part of why I like the current season so much is because it's very close to the games, which is generally not the case. I played the game in full, & then started watching, & I appreciated it a whole lot being able to compare notes & see how characters I liked come across in animation.
Best Wishes brought me back in full at the time, too. B/W was so good & remains my favorite of the main games. I too got bored though, around the Meloetta arc. At least it didn't have all that stupid pageant crap from the Sinnoh seasons. Eugh! & hell yeah, Dento is the man! Funny ass character, whose companion is one of my all time favorite Pokemon. I really liked him & Iris. Ash's new friends are really enjoyable too, they're not as full of personality as those two, but they're not nearly as dull or annoying as Serena & those other kids. You've got the shy one, the accomplished one, the underdog, the cocky nerd, & a cool ass surfer scientist senpai.
