I have a fairly extensive collection of Gloranthan gamebooks, fanzines and other esoterica. Once I was totally entranced by this world, but for reasons not of that world I fell out of love with it.
Now a few days ago I once again became amazed by the enormous amount of "gameable" stuff there is in there. So many cultures are strange mixes of real world cultures, but with that extra twist that makes you want to invent reasons for how that extra twist came to be. Put that power in the hands of players, and I think you could have a jolly good time.
Since I hadn't read about things in a long while I got back on the main Gloranthan discussion list to ask about a few things which had gotten muddled in my brain. Guess what happened? I totally fell out of love of it all again.
Having people tell you from up on high how things really are, that is a killer for all kinds of enthusiasm. The world enemies of Glorantha as a game world always seems to be its official publishers...
*sigh*