I've never really had much of an issue getting up early, so I guess I fit better under option 1). For myself, I think a big part of it is good discipline. But I have also always liked mornings and many activities that I enjoy are ones that are best early morning rather than later in the day.
I think I'm most alert in the mornings too. At least.. once I'm up and moving.
I'm probably most sluggish in the afternoons, however. Evenings I can perk up once again, but I've never been a night owl. I'll stay up late now and then and it's fun and it's not like I *must* get to bed at a certain hour each night... but, yeah, if I'm just by myself I'm always in bed before 11 or 12.