Best Product of 2005: Lords of Madness. After the disappointment of Libris Mortis, this book restored my faith in the "in-depth" monster series. Dripping with flavor, cruch that actually supports the theme, not just included for the sake of cruch, and beautiful artwork.
Worst Product of 2005: Like most people, I wasn't impressed with either Weapons of Legacy or Magic of Incarnum. Champions of Ruin was a disappointment for the wateed-down elder evils and the amount of old, non-3.5 content that slipped past editing. Although it's not a bad book, I my choice is the DMG II for introducing the new stat block which has made all future monster entries an absolute chore to use.
Best Out-of-Game RPG Moment of 2005: For me, it's a three-way tie between the announcement of the Fiendish Codex series, the book I've always dreamed would be made by two of the people I'd most trust handling it, the Demonomicon of Iggwilv series in Dragon, and getting published for the first time ever in Dragon Magazine (Monsters of the Mind in #337).
Worst Out-of-Game RPG Moment of 2005: The announcement that all future books would be using a slightly modified version of the new NPC stat block for monsters.
Best In-Game RPG Moment of 2005: Finally reaching epic level with my character of 5+ years.
Worst In-Game RPG Moment of 2005: Losing the character who had the party loot in his portable hole. Talk about putting all your eggs in one basket...
Most Looking Forward to in 2006: Fiendish Codex I.
Most Looking Forward to with a Horrible Sense of Dread and the Beginning of an Ulcer in 2006: Monster Manual IV. I pray it has better editing and creature selection than MMIII, and praying that the new stat-block format improves by then.
Least Looking Forward to in 2006: Whatever product manages to make feat descriptions extra lengthy with lots of useless sample information and justifications for use (see new prestige class format...you know it's bound to happen).
Best Movie of 2005: Batman Begins.