Brown rice, lower glycemic index and it still has the hull on it so more bran content whereas white is enriched and has been hulled. - This is really only important to dieters I suppose
Otherwise I love Wild rice and after that Jasmine or the short grained type rice that is stickier.
BTW to answer the what is yellow rice question, yellow rice is just white rice that has safron (sp?) added to it to give it color and flavor. Also has a couple of other things in it... You find it a lot in the south, but from what I understand it has Latin origins.