I've given some thought to odd shaped worlds but in the end decided to go with a round world for my homebrew. It doesn't come up that often in games, but it does seem to help players feel somewhat familiar with the setting (and I've screwed enough with the environment in the setting that they deserve something 'familiar').
So yeah... my world is round (the body of the first god actually). It also has no oceans. It is a "land planet". There are several large inland seas; a vast network of rivers; and huge expanses of geyser riddled earth, dreary marshland, and forbidding rainforest. It isn't an iceball or a desert world. It has climates and seasons, allbeit much harsher and much more extreme than those of our own world.