I don't know how many people would be interested to read this or list theirs, but here are all the episodes of each season I found awesome rather than good or all right:

Season 1:

  1. Dragonshy (which was my second episode, but the first I recorded so it felt like my first as I'd watch it every morning until the next one came on)
  2. Bridle Gossip
  3. Fall Weather Friends
  4. Suited for Success
  5. Feeling Pinkie Keen
  6. Sonic Rainboom
  7. A Dog and Pony Show
  8. The Best Night Ever

Season 2:

  1. The Return of Harmony
  2. Luna Eclipsed
  3. Hearth's Warming Eve
  4. The Super Speedy Cider Squeezy 6000
  5. Read It and Weep
  6. Hurricane Fluttershy
  7. MMMystery on the Friendship Express
  8. A Canterlot Wedding

May the Best Pet Win and The Mysterious Mare Do Well have been removed from the list, since I only chose them for being Rainbow Dash episodes

Season 3:

  1. The Crystal Empire
  2. Magic Duel
  3. Wonderbolts Academy
  4. Keep Calm and Flutter On
  5. Magical Mystery Cure

Season 4:

  1. Princess Twilight Sparkle (only for the flashbacks, the rest was underwhelming even with Discord)
  2. Castle Mane-ia
  3. Daring Don't
  4. Power Ponies
  5. Bats!
  6. Pinkie Apple Pie
  7. Pinkie Pride
  8. Filli Vanilli
  9. Testing Testing 1 2 3
  10. Twilight's Kingdom

Season 5:

  1. Make New Friends But Keep Discord
  2. Slice of Life
  3. Do Princesses Dream of Magic Sheep
  4. Crusaders of the Lost Mark
  5. The Cutie Remark

Though I did appreciate the sensational moves of Tanks for the Memories, The Lost Treasure of Griffonstone, Amending Fences, Rarity Investigates, and (on a more minor scale because it's the first time Pinkie Pie blushes) The One Where Pinkie Pie Knows.

Season 6:

  1. Gauntlet of Fire
  2. A Hearth's Warming Tail
  3. The Saddle Row Review
  4. Spice Up Your Life
  5. Stranger Than Fan Fiction