I prefer TPS's because they usually offer other gameplay mechanics than shooting. The most common one is platforming, which I enjoy if well made. Cover systems also seem to be better in TPS's. I also like to see my characters and the fact that in 1st person you seem to walk on rails and you can't see your own body breaks the immersion.
Surprisingly TPS's are winning by a large margin, considering that FPS's are the most popular genre since years.














