Well I got some very useful information from another site.
1. Comes in a wide array of colors and patterns.
2. The front fly is much easier to use.
3. Easier to take off (women agree).
4. Crotch temperature stays cooler.
5. Women tend to prefer boxers on their man when he’s a little out of shape.
6. Considered socially acceptable loungewear.
7. Can camouflage a man's physique.
Con: 1. When wearer becomes excited…, it shows. 2. The legs are open along the bottom. 3. Provides almost no support. 4. Bunches up when worn inside pants. 5. Thick waistband can cause irritation. 6. Their looseness can cause them to ride up above the waist. Briefs: Pro: 1. Prevents "dangling". 2. Won't bunch up when worn under pants. 3. Legs have elastic. 4. Provides support. 5. Stays in place - no riding up. 6. Looks best on a guy in great shape – and women agree. 7. The choice of European men.
Cons: 1. Overlapping fly is almost impossible to use. 2. Generally not acceptable lying-around-the-house wear. 3. When the elastic band deteriorates, the whole brief looks tacky. 4. Comes in fewer colors and patterns. 5. Moving from briefs to boxers has traditionally been a passage into manhood. 6. Can become out of shape and "bag" in all the wrong places.
Boxers are almost like shorts. They are usually made out of satin, but sometimes cotton. They are apparently more comfortable but I've noticed with some guys when they take their jeans off, the boxers stick to them so I suppose they create static electricity? briefs are more like guys underpants. Made out of usually cotton, and have a pouch for his... junk.