Blog hosting URL

[wmuser]

I am going to offer a free blog hosting to my users but wondering,from the point of SEO under which URL to offer it to them?

I have options
blog.domain.com/username
blogs.domain.com/username
www.domain.com/blog/username
www.domain.com/blogs/username
username.domain.com

At the moment i am thinking of blog.domain.com/username

Please advice based on your experience

[caveman]

wmuser, what is it that you're trying to achieve? Obviously you have something in mind since you're considering alternatives that would produce different sets of dynamics. Why are you considering these alternatives? If we know your objective it's a lot easier to provide meaningful input. ;-)

[wmuser]

caveman thanks for reply :)

Actually i am trying to figure out two thigs
1)Which one of above methods will be easier for visitors to remember a particular blog address
2)Which one of above methods search engines will like more