Really depends, and we can't sum so many years of practice in a nutshell here. Sun is nice esp if you hide it behind a tree and shoot. Filter or not it's up to you, if you want to be creative or not. Personal taste. You don't need to avoid direct sunlight, rather, where to focus and meter at. Etc etc just read the stickies!
Newbies guide: http://forums.clubsnap.com/showthread.php?t=245883