Power ponies > Sleepless in ponyville > Boast busters > No second prances > Cutie pox > appleloosa's most wanted.
Power ponies. LOVE IT. I'm a sucker for adventure episodes, and I really found this one to strike a tone as a nice, zany adventure/fighting episode. Plus, Rarity's powers were PERFECT.
In fact, the only "bad" powers was twilights due to her already HAVING that stuff and basically having no powers that she could be given that she couldn't already concievably do XD
Arguably, fluttershy's too, as she was funny, but it wouldn't work well for an ongoing power for her, IMO.
Anyways, love that one, would watch a series of PP.
next up, sleepless in ponyville. Great episode, loved scoots, and RD and her had some good interaction. Plus, Luna is excellent as a dream guardian.