This is Diablo right so why not the Pentagram? it's a "Star"
Or is it the other way round in Diablo? single point at the top? I think it's single point at the top. It is with the flame Pentagrams in the game, such as in areas like the Forgotten Tower in Act I.
Oh and for funzies here's a neat little animated one.
No, the double points are at the top, it's the Satanic pentagram. And don't you think we should have something just a little less demonic, or at least equal in both respect of good and evil? Isn't our motto something like In the name of god ...something about killing evil...something...Blah. That 3-D one is really cool, though, I like the spinning parts xD (Is this on topic? Oh well, I guess I'll get nailed with posts soon enough.)
On the "make it more Diablo-ish" comment, you could always give it that gothic cathedral look, with lots of thin, yet firm, and tall/elongated contours and stuff, if you get me? I'm not sure I quite get myself sometimes... I am but a lowly user of easy Picasa "editing" functions, so I have no place to say that the one you made is ugly, because to me it definitely looks nice, and crisp, but I'd have to agree with making it more DIablo-esque