I went with my gut feeling during my entire AN journey.
It all started the day I met my neurotologist. After talking to him, my gut told me that I didn't need to look any farther or consult with anyone else.
I liked him, I knew he had the experience and could do the job, he was honest with me on all accounts (even insisted on giving me all the brutal statistics no matter how small of all the possible side-effects I faced in each treatment option - even though this scared the hell out of me), and I just knew he was the guy for me. He also respected me and refused to make a decision for me - because as he rightly stated, I had options and it was my choice, not his.
My next gut feeling related to my treatment decision. I knew I didn't have the personality-type that is conducive to radiaton - I'm a control freak and want results ASAP; I don't like to wait - so my gut told me that surgery was my best bet. I would know pretty fast what I'd be dealing with after my treatment and I'd go from there.
Once I made the date for the surgery, met with the neurosurgeon, and organized everything in my life (job, kids, etc) so it would go smoothly during my recovery, I never looked back or questioned my decision. I had a strange feeling of calm - even in the holding area waiting to go into the OR.
I was confident I made the best choice for me based on my particular circumstances. Second guessing yourself is counterproductive.
So my best advice is educate yourself, find a doctor (or doctors) that you have faith, trust, and confidence in, make your decision and just let go. Don't look back.
Jan