"The D&D game system is flexible, but it’s also meant to be a balanced
set of rules."
Its fun to see the word "balanced" in 3.5.
There are some totally OP class combinations ( most of them make no sense RP wise ) while it is very easy to make a totally useless char.
I played NWN2 and its amazing what you see when looking at the build maker.
I also read something about a PnP build contest were the winner was a gargantuan monstrosity with many classes, sorry I do not remember details but I think it had also many arms.
Well, you could role play this as " I am a (monster race x) on an epic quest to become a demon lord."
Best/worst part? The horrid balance was intentional:
https://web.archive.org/web/20081223093330/http://www.montecook.com/cgi-bin/page.cgi?mc_los_142
And
this RPGNet thread explains a lot of the problems.