Acually I prefer smaller forms than say a large 1 hour long symphony. So I would probaly like to write say an overture or a symphonic poem... On the scale of something like Mendelsohns 'The Hebrides Overture'(oh god is that piece good).Same goes for piano, instead of a momentous 30 minuet sonata (Beleive me though, i do enjoy many) I would to concentrate my power on something smaller, like Chopin did.