Science Fiction or Fantasy?

I read a lot and collect certain authors. I prefer combat science fiction : Jerry Pournelle (The Mercenary) David Drake (Hammers Slammers) William C. Dietz (The Legion Series). I also like Elizabeth Moon (Heris Serrano, Esmay Suiza) and David Weber (Honor Harrington) books. I have been reading a lot of Fantasy lately since a co-worker loaned me his chronicles of Narnia. My favorite is Brian Jacques "Martin of Redwall" and other books by him. What or who do you like when reading either genre?