Wtachnerd, thanks! Only reason I clean from the floor instead of power position is I just enjoy the bigger ROM, find it enjoyable. I am not training for anything other than being a bad a#@ 100 year old so intensity stays low. I've been doing this as part of Easy Strength type program. On of my knees is a bit "dodgy' though. Yesterday, just getting up out of a chair after sitting awhile, for no apparent reason, it sort of twisted and "grinded" (new word) and I was limping the rest of the day, this after a couple days off, no training for other reasons. It just feels to me as if explosive extension is totally fine but high speed contraction easier for me to run into a problem. I love jerks and by and by will do a cycle of them but pressing is much more upper body while jerks put more work into the legs, yes?
I think you're confusing the hang start position and the power end position. You can power clean from the floor -- in fact, it usually is done from the floor by lifters who are just training for sport.
Hang denotes starting from the waist.
Power denotes finishing with thighs above parallel.
A 'normal' power clean is done from the floor, but the bar is caught in the power position, i.e. thighs parallel or above.
Power Clean Exercise Demo Video and Info
A 'hang power clean' starts from the waist, ends in the power position.
Hang Power Clean Exercise Demo Video and Info
A 'hang clean' starts from the waist, ends in a squat clean position.
Hang Clean Exercise Demo Video and Info
Based on your desire for full ROM, but without any concerns about Olifting technicalities, I think what you want to do is a not a full clean, but just a power clean with a front squat:
Power Clean Into Front Squat Exercise Demo Video and Info
As for jerks vs presses:
Yeah, you use the legs more on jerks than on presses, but jerks make you faster, build a better lockout (press outs are 'no lifts' in competition), and let you test your overhead limit loading more than presses do.
For hypertrophy of the shoulder girdle, I prefer Klokov presses, push presses, and kettlebell pushups.
(I, like many Olifters, pretty much never bench press).