Nabber said:
yes, but it's minor
i just don't particularly care for the characters in this show. that's just the matter of it.
Then I feel like you're not really watching it for what's basically the point of the show. The characters are basically the show's strong point. Sometimes it isn't the most consistent, but at it's best it still gives a strong sense of meaning seeing these characters bounce off their personalities with eachother with what situations happen to them. They each have distinct personalities, and while there's a few that arguable if they've had much development at all (Fluttershy and Pinkie Pie most of all) they do have at least some subtle change in which they're different from how they were in Season 1 when they were just learning.
Here's an example of all 6 in how I mean they've developed:
Twilight early in Season 2 could get stressed over the littlest thing to the point she'd go insane in Lesson Zero. In Games Ponies Play, with a tip from Cadence she manages to keep herself more calmer then usual despite the mistake of the wrong inspector. Granted that didn't really come in a good episode. But it was one good thing in what was otherwise a plain episode. (Speaking of which, you want a boring FiM episode? How about Look Before You Sleep or Apple Family Reunion?)
Applejack in Super Speedy Cider Squeezy 6000 lets the others of the Main 6 help when in Applebuck Season she was stubborn to let anypony help.
Rainbow Dash as I said showed great growth in Wonderbolt Academy. Lightning Dust may as well been a mirror of Rainbow Dash had she never met the Mane 6. Still talented as all heck. But too much arrogance
Rarity from Suited for Success onwards has proven to be one of the characters with the most depth. She's the element of generosity but her lifestyle and general wants in life has sometimes challenged her. In no other episode is it more apparent then in Sweet and Elite when she has trouble deciding priorities between Twilight's Birthday Party or living her dream to hang with the Canterlot Elite.
Fluttershy finally put her trauma from being bullied as a filly past her in the climax of Hurricane Fluttershy.
And while Pinkie Pie is the hardest to see development for. Too Many Pinkie Pies was perhaps the first episode since Party of One to show a new side to Pinkie. We saw how different the real Pinkie was from the clones who are pretty much what people who may think she's a flat character is like all the time. But this shows she's not like that all all.
Some of the developments in the episodes aren't perfect, but they're there nonetheless. And proof this isn't just comedy all the time. These characters learn and grow, and that's more then most cartoons these days can say.