TtV Photography

I was at the book store the other day and ran across a book on creative photography.   I was looking through it and found a chapter on Ttv photography.  What you do is you get an old camera and shoot through the viewfinder of the old camera.  Around a year ago I did this without knowing I was doing it. I have an old Edixa camera from the 60's that I used.

Anyway, I found some videos that explain how to do it! It's fun to try and I think this would be a great idea to try for portraits.  Let me know what you think by leaving comments.
Thanks,
Brian