Different sites, different visitor profiles

I thought I'd make a record of the share of visitors two of my sites get from different search engines. The profiles are very different and not really what I'd expected. the first sets gets over 90% of its traffic from direct addresses/ bookmarks but here are its search engine stats:-

1. Windows Live - 53%
2. Google - 32%
3. Yahoo - 10%
4. AltaVista - 2%
5. Alexa,Google Images,Tiscali,Dogpile,AllTheWeb - 3%

The second site gets less than 5% of visitors from direct traffic. Its search engine stats are:-

1. Google - 77%
2. Yahoo - 10%
3. Unknown - 8%
4. AOL - 2%
5. MSN, Tiscali, Ask Jeeves, Alexa, AltaVista - 3%

The search engine stats are very different between the sites. The second site is my oldest. For both sites Google is very important but I'm surprised to see Windows Live heading up the list for the first site. The first site is quite new - less than 2 months old. In another couple of months I'll see how the search engine stats are looking then.