Interestingly enought this isn't entirely true. The one who invented Warforged didn't work for WotC, he entered a "Design a Setting" contest where the winnins steeing was guarenteed to be published. The Setting proved to be so popular that is lived past the guarenteed publishe material into a fully supported product line.
The Eberron exclusive races (including WF) were popular enough to be made core in the 'Races of Eberron' book.
Agreed. I only have 2 WF characters, but I play Priam waaay more than any of my other toons combined (possibly exception being my halfling Ranger/Rogue). Maybe it's because I'm a lanky, pale-skinned D&D nerd IRL, but I really like being a bad*** sentient golem with a sword longer than most others are tall.
"I shall take my bow by opening my heart and revealing my wisdom...Belief or disbelief rests with you."
I've been playing PnP for a long time too, but I've always been a fan of golems, elementals, undead, and any other big scary looking things I can have following me around. So it was a smaller jump from that to actually playing said big scary looking thing as a main character. In fact WF was one of my main reasons for trying DDO.
My first introduction to D&D was thumbing through the Monster Manual after having the gist of the game explained to me saying "Ooh, this looks cool. Can I be this?" "No, you can't be a mudman." "What about this?" *points to Death Knight* *DM takes book in frustration, pages through it and hands it back* "These are player races" "What?! Why would I want to be a midget?"
To this day I'm still an advocate of monsters as player characters in my own games. (And I have yet to play a Dwarf or a Halfling in 20 years of playing. A few gnomes though, just for the whole crazy inventor factor.)