jental - I replied to you and I can assure you that if 100 complaints came in about your blog that there is more chance I will eat a cactus than your blog being marked as Mature.
I see your blog as more art, the sort of image I would see at mainstream art gallery.. I do not see it as titillation, as gratuitous expose of flesh, as any level of porn.
What is Mature? If only it were easy to say.
Lots of profanity - probably.
Some profanity - probably not
A few images of topless women (for it is usually women and western society tends to see the topless man as non sexual generally) - probably not
Lots of images of topless woman - probably
Genital images - definitely unless the blog is educational (and yes, we know the difference between education and not)
Images of mutilation, dead people, injuries, cruelty, killing - definitely.
Combinations of the above - probably
Declaring your blog 18+ - definitely
If I showed you an image and asked you if that should be in an 18+ magazine you could tell me. You too would have Yes, No and "well, maybe..." and after more information that 'maybe' would turn into a Yes/No. That's how we do it and we try to make the balance. There are 2 of us that mark blogs as Mature and we will discuss why quite happily and advise if there is action you could take to remove the Mature.
Bear in mind that these all depend on context too. If someone is blogging right now about the situation in Thailand then in no way would we make the blog Mature. Again there is a difference between posting for interest / the "yuk" factor and actual events that people should know about and should be able to see more than mainstream media or propaganda will show.
We do get a lot of requests from people asking that their blog be made Mature. In some cases I have said they should start blogging then come back after a few weeks as content decides and blogs change.
Note: we have exceptions to the above with regard to blogs created by and seen by people living in certain countries such as Iran (there are others, their names escape me right now). Their culture deems that any female flesh shown is a very bad thing and people there create blogs which we would not see as Mature, they do. So we do mark those.
If this raises more question, fire away.