http://alexa.com/site/ds/top_sites?ts_mode=global&lang=none 1. Yahoo 2. MSN 3. Google 4. YouTube 5. Live 6. Myspace 7. Baidu (chinese) 8. Orkut 9. Wikipedia 10. Facebook 11. Hi5 12. qq.com (chinese) 13. rapidshare.com 14. blogger 15. Megaupload 16. Yahoo.co.jp (Japanese) 17. Microsoft Rob
If it's just mentality, Google, Yahoo and Youtube, followed by social networking sites Facebook and Myspace
Google is the world's most popular website according the many blogs and forums. That is it never happened that when you use internet you did not open Google.