i still need to watch the finally so I'll edit my thoughts in on that after ward, but so far!!
good season is good,
first 4 eps where awesome.
Discord was awesome, it's like they took what they did wrong with Nightmare Moon and fixed it
watching Twilight lose her mind in a way that made Pinkie Pies mental break from season one seem tame.
an ep focused solely on Princess Luna, 'i approve' dose not cover it. i was squeeing with joy the whole ep
other great eps include
Sisterhooves social
Read it and Weep
Putting your Hoof Down
My the best pet win
Super speedy cider squeezy 6000
Hurricane Flutter Shy
it's about time
the best song? easy
EDIT: season 2 finally thoughts:
it. was. AWESOME!!!!
Rarity having a 'fit' at the beginning, priceless
the bad guy being a decent bad guy? awesome

not Discord, but hey, The Queen did a fine job being evil
the songs i thought were good, especially the last one 'Love's in bloom' i think is what it'll be called
and on a more personal note ....
OMG LUNA!!!!! WITH LINES!!! *SQUEE!!!!!* they listened to us



(for those confused Luna was not in the Season 1 finally at all, nor was she mentioned at all, this was kinda frowned upon by, pretty much every one)