My riding position is more aggressive and aero now than in 2015 when I first resumed cycling after a 30-year hiatus. But that demanded a lot of physical therapy, in a clinic under supervision and at home. After being hit by cars twice in 20 years with serious injuries it takes a lot of work to stay reasonably limber.

I set up my bikes to suit my neck, which has permanent C1-C2 damage from injuries. I prefer being a bit more stretched out, but without too much drop between bar/stem and saddle. Over the years I've gone toward longer stems.

Oddly, a position that's too upright is less comfortable. My neck feels better with a moderately aggressive position -- usually illustrations 2 and 3. When I'm sitting too upright I can feel crunching in my neck on every little jolt in the road. And an aero tuck with drop bars or aero bars strains the neck and upper back muscles, so I can hold an aero tuck for only 30-60 seconds at a time.

I mostly ride drop bar road bikes now -- bars about 2" below saddle height -- and had to adjust my favorite hybrid to be a bit more aggressive for comfort. I replaced the upward angled stem to a long horizontal stem from a road bike, and set the albatross bar at saddle height. My comfort hybrid/errand bike has bars slightly higher than the saddle and is comfortable only for short distances.