Not my reasons:

1. Becoming a Sony fanboy
2. Move is superior to Wiimote, and also the pioneer of motion gaming
3. Sony offers original games experience (which makes you appreciate the games more)
4. It's a Sony
5. PS3 is hardcore
6. PS3 offers full HD and 3D experience
7. PS3 offers warranty
8. PS3 exclusives
9. PS3 have Six axis
10. PS3 have DS3
11. PS3 have free online
12. PS3 have 10 years life span
13. Sony are best towards their customers
14. PS3 have BD
15. PS3 have no games for kids and ladies
16. Bravia + PS3 = gaming heaven
17. More easy to buy second hand PS3 games
18. PS3 is all in 1 entertainment system
19. PS3 community is the best
20. God says don't play Nintendo stuff