The Semillon or Sémillon grape is an under-rated white grape variety - read more in my Semillon blogpost. It is versatile, producing a variety of styles including
complex, fuller-bodied, still dry wines and
rich sweet wines plus
it blends well, especially with Sauvignon Blanc and particularly in Bordeaux and in Australia.
Semillon may not appeal to people who prefer their white wines to be very light in colour and body but you can usually find a style that suits you. If you are a fan of Chardonnay try a 100% varietal and if you are more of a Sauvignon Blanc fan, try a Sauvignon-Semillon blend e.g. from Bordeaux. And don't forget the classic dessert wine.