Training Junkie?

First, I am having major anxiety that my training plan hasn't started yet. Maybe I'll just start a week early - this coming monday - and just do the first week 2x? I feel like I'm just floundering around (in flip flops, or otherwise) when it comes to my workouts. Results? Crazy lots of upper body work this weekend. I mean, it hurts to lift my cuppa tea.

Second: Post-Lake Placid several people (Nat and my dad included) asked me if 26.2 was next up for me. I had toyed with the idea, mid-training, of doing a full this fall. As training continued on, and I hit some difficulties, I began to doubt if I could do a half at all, let alone a full.
Obviously, I can run a  half. And I'm super excited to do another.

I don't know if I have the marathon bug...yet.

I do, however, have a ridiculous desire to train for one. I want to put in the work, and fight the good fight, and face the challenge, and (mostly) put in the mileage. High mileage really appeals to me, for whatever reason. But, I'm not sure if I've got the will to really run the whole race.

Is this weird? Does anyone else experience this desire to just train?
I've never been very competitive, so maybe that's got something to do with it.

For the time being, I'll just keep on running, and thinking about what might be next ;)