Mine have never attended school, but I taught for 7 years if that helps. ;)
1. Phonics instruction - learning all the phonograms and how to use them/how to sound them out
2. Individualized instruction - go at their speed, at their level, and integrating their interests
3. Time to actually "fit it all in" - not only the core/foundational subjects like reading, spelling, writing and math, but also history, science, Latin, art, music, PE, etc.; plus we get it all done faster
4. No separation of family time and learning time - they know that we learn in a variety of ways and that we all are capable of teaching each other
5. Plenty of cross-generational and co-ed opportunities - siblings are playmates, they interact with people in our community of a variety of ages, girls are equally good for playmates as boys
6. A lot less stress