Would I rather climb a mountain or run a marathon?

UTMB 2008 (231)

To answer this question, I need to ask popular opinion if one should stick to do what one does best or one should keep trying on new things?

I've climb mountains throughout my university years (and boy was it a loong years). Some of the classes required us in climbing these mountains, the student uni required us in climbing other mountains, and for some others I did it for fun. Climbing a mountain was like going to the dentist when I first did it (Hell no. My dentist is very kind and I'm never afraid to be with my dentist, so this association is not very well) : I didn't like the preparation, the breath panting, the extreme weather, the pain in my legs.
But then I got used to it, it becomes a ritual and I got smarter in preparing myself (mentally and physically), storing oxygen, and wiser clothing (I can never get over the pain in my legs). Climbing a mountain became no longer a challenge, it's just an option for my weekend.

I run of course : Every morning with my dog (every day from reality?? -kidding). But I never run a marathon. Is it that hard really? Or is the secret to run a marathon is like Barney Stinson of HIMYM once said : "Step one : you start running. There's no step two" Hahaha. Seriously, for the sake of my life reputation I should run a marathon. People will surely think I do try everything in life, "What a fun life that gal has"

Now. Se-Ri-Ous-Ly. To answer that question sincerely. I'd climb a mountain. Why? Because I forgot to tell you how wonderful feeling I had being on the top on any mountain.