My feeling is that if someone is turned on by the idea of having their body pounded and bones broken to no end, until at 40 they can barely move. Then good for them.
I don't think all or even the majority of martial artists enjoy this though.
I just have to say that I got injured more often while training in Aikido than I have in BJJ/MMA. The high falls, allowing people to twist and lock joints, randori, etc. all add up to lots of potential for injury.
In regards to the original post...Aikido is what it is and MMA is what it is. They can compliment one another or they can conflict with one another; it's all in the eye of the beholder. Some of us here on Aikiweb do both and find no problems with it, others think that they should be kept seperate. Whatever works - variety is the spice of life y'know?
As for attracting this or that sort of person, I posted a diatribe on that topic here: http://www.aikiweb.com/forums/showth...179#post123179
That thread in general has a lot of good information in it.