I agree.
Anyway, I ban anything not printed by WotC. Anything Green Ronin, etc, all that crap I completely ban. I ran a game with my group where one of the players decided to screw with me and make a character completely out of the unsanctioned splat books and I tentatively let him run it until he abused mechanics to somehow get Storm Rage at level 6 and continually grow in size category for every creature he killed. I introduced the bad guy early and raped him with Rule 0. No more unsanctionedin my games.
To each their own. I found WOTC 3e DND products, for the most part, to be crap or barely average. From my perspective, the only non-core WOTC books worth owning are the following:
Unearthed Arcana
Fiendish Codex I
Lords of Madness
Heroes of Horror
Stormwrack
Book of Vile Darkness (for the demons and devils, and some spells)
MM2 and Fiend Foli: for many monsters from 1e and 2e
Cityscape web enhancement with the wilderness/urban skill swaps.
Depending upon my mood, Complete Warrior, Complete Arcane, Libris Mortis, and Sandstorm
In contrast, thre are all these great third party products from the 3e era (and I could include more):
Green Ronin
* Cavalier's Handbook: ok not a fan of the class itself (I prefer Hong's Knight adaptation of the OA Samurai), but I'll take the class over the Knight from PHB2 and the rest of the book is really good.
* Psychic's Handbook: Imo, the system for mental powers is muc hbetter than every one of WOTCs Psionics books
* Shaman's Handbook: Imo, the class is much better than WOTC's Spirit Shaman and as, a sourcebook this, and the other Masterclass handbooks are what WOTC's should have been
* Witch's Handbook
* Advanced Bestiary: One of the two best book of templates (the other being
Silverthorne/Goodman's Games's * Deluxe Book of Templates Revised)
* Both Armies of the Abyss (to be fair to WOTC, I also think Fiendish Codex I is really good) and Legions of Hell (you can get these combined in Book of Fiends along with a third book)
* Unholy Warrior's Handbook
Blue Devil Games
* Poisoncraft: alternate rules for poison
Silverthorne/Goodman's Games
* Deluxe Book of Templates Revised
Adamant
* Hot Pursuit
* Hot Pursuit: On Foot
* Corsairs
* Fantasy Occupations: The d20Modern Occupation system for D&D
Atlas
* Crime and Punishment
* Love and War
Bastion/Dragonwing
* Airships
* Alchemy and Herbalists
* Ink and Quill
* Torn Asunder
EN Publishing
* Elements of Magic: Mythic Earth
* Elements of Magic: Revised
* Elements of Magic: Lycian Arcana
* Advanced Guide for Beginners
Expeditious Retreat
* Magical Medieval Society: Western Europe
* Magical Society: Silk Road
Malhavoc
* Book of Iron Might: I"ll take the maneuver system over Bo9S every time.
Monkey God/ Highmoon Studios
* From Stone to Steel: so much better than WOTC's Arms and Equipment book.
* Frost and Fur: so much better than Frostburn
Mystic Eye Games
* Artificer's Handbook: alternate magic item creation system