My travel preferences:
Less than 2 hours: Coach is fine (but will still price first class to see if it is worth it)
More than 2 hours: First. (Unless the fare is nuts)
Overseas: Business Class
I will fly Jet Blue, but purchase the 'even more room' seats.
I enjoy travel, and have decided to do it well. My best friend thinks paying for anything but basic economy is nuts, so he is fine with the middle seat in coach on a TATL. Different people have different preferences.
I would like to try first on a premium airline to see how it is, but I can't justify the extra money.
The best way to know is to try. Be careful, you might get hooked on it like I am.