So I haven't touched the series much since Season 3, not because I disliked Princess Twilight, but because I moved back home and not too open about being a fan of the show (family loves to dwell on things that are easy to make fun of. Just ask my gay cousin).
So I finally got to marathon through the series and so far it's gotten pretty dang good!
Season 3 is probably the weakest because it's so short. Twilight's Ascension never bothered me as much as others, though I admit it felt a bit rushed and the purpose of how and why it happened could have been explained/showed a bit better. And despite what the show makers say, I include Equestria Girls as canon since it fits in rather nicely with the rest of the story...it also helps to make Season 3 feel longer.
Season 4 has to be my favorite so far. It has the best continuity, the best stories, and some (but not all) the best songs (You'll Play Your Part is easily my favorite song). Not to mention I think that the way it ended would have been a perfect series finale if it didn't continue.
Season 5 was a lot of fun, but I felt that it lacked the same...oomph that Season 4 had, though that might just be because that Tirek fight was so awesome. The one thing I'm a little irritated by is that the Crusader's Cutie Mark episode felt as rushed as Twilight's Ascension episode was. It should have been saved as the second-to-last episode of the season at the very least, and given at least one or two more episodes of them helping to discover the meaning of other marks before they accepted it as what they'd like to do. As for Starlight Glimmer, I don't mind her joining the cast to make it the Mane 7, so long as she actually grows in character.
I will say this, though. I appreciate that the show is taking the risk of actually continuing the stories and advancing the lives of the characters. Unlike some shows where everyone and everything is in the exact same place ten seasons after the start. It oddly enough gives a sense of maturity to the series as it goes on. Looking forward to catching up on Season 6 and finally getting to watch Season 7.
A few things that I'm still hoping for:
- The Crusaders doing some of their Mark Purpose thing (maybe with Babs showing up again. I liked her)