Which episodes that I've listed do YOU think are good?
well, I can't answer for him, but I can say that C^3's pretty correct in stating that several of the episodes on your list are good. "True Blue Swablu", "Go Go Ludicolo", and especially "Do I Hear a Ralts?", for example, were all pretty nice, characterizing episodes. You also brought up the Houen Grand Festival, and every "recent" Battle Frontier episode. I don't know what you mean by "recent", but I assume you mean everyone that Pokemon USA has done, and when you've got episodes like "Sweet Baby James", "Tactics Theatrics", "Odd Pokemon Out", and the Kantou Grand Festival, that is f***ing wrong on so many levels. I mean, come on.... Manene, Jukain evolving (with a pretty decent storyline revolved around it), one of the best battles in a gym, Brain facility, or otherwise, Harley pulling off the robe to suddenly reveal he's cross-dressing, etc. I don't think many people would agree with your choice for the Diamond/Pearl episodes neither (I'm not gonna bother with spoiler tags, but I will say that they're probably the best thing to happen to Satoshi's storyline in a long time, given how plain his badge-collecting has gotten).
But I guess you're left to your opinions. Still, if you enjoyed what's arguably crap like the Kyogre/Groudon two-parter, and hated stuff like "Do I Hear a Ralts?", I'd hate to know what you perceive as good writing. Though, I will be inclined to agree with you on some of those (particularly the Yamabuki contest, where the cheapest incident in the series occured, and how the end of Battle Frontier was crapped on. Most of my complaints stem from the Jindai finale, but the final episode, nonetheless, made the horrible mistake of rushing what should've been an important scene).