I realize I've spent more saddle time this summer riding on my "fast" bikes, i.e. bars below saddle height and using the drops more. The result seems to be I'm focusing 20-30 feet in front of my bike, somewhat head down position. Someone drove by me and mentioned later they saw me out hammering my way across town, "head down".

This seems like a dangerous habit to get into. Is this simply an age thing? Are you finding you aren't looking around anymore but focusing directly ahead? If you are riding fully in the hoods or drops, are you really head up, looking around & in the distance?