Malmo,
I am someone who best fits your 4) category person, and have decided I want to get as serious as possible because I enjoy running so darn much.
As a rising junior in college I obviously don't have a specific season coming up, and was wondering if SoM is still the best option given that situation.
I have about a year and a half of inconsistent running under my belt, with two 4 month periods where I averaged 35, and 50 mpw; in between those was very sporadic running. I'm definitely slow, with a 5:51 best mile time and a 20:23 best 5k time.
Just looking for some advice on where to start my development as a runner, assuming I want to ultimately come as close to maxing out my potential as I can. Any advice on what I should be doing is greatly appreciated.