My fxr3 came from previous owner with forwards.
They were comfortable, looked good, and I thought I liked them.
But the way I ride I always felt I was sliding off the seat.
It also had pullback risers (original) that were comfortable but put me in a more reclined position.
But I never putt my bike, and comfort is not what I need or want.
If you ride fast go with mids and straight risers.
This will put you in the right position to react quickly and not have to shift your body or move your feet.
If you like to cruise then go for whatever makes you most comfortable.
I think how and where you ride are the biggest factors to this.
On SoCal freeways while splitting lanes comfort takes a back seat to control.
But beware these bikes are low (too low). I used to scrape my forwards.
After the switch I scraped my mids.
I went to 13" shocks. This helped a lot.
Now I am adding +2" fork tubes.
If I was just getting into the fxr thing especially with the cvo bikes, the 1st thing I would do is go with 13"-13.5" rear shocks and +2" fork tubes.
I would keep the mids and try out some different length straight risers. I like 8" and I am 6'0 tall.
Very comfortable with lots of control.
If you like apes or buckhorns you can probably rock the forwards and be cool and comfortable all day long.
I think this is the big divide between different riders.
To each their own, just ride it and don't wait for it to go up in value. Its a motorcycle.
Oh and here's a pic for mids on an open primary for previous poster. Not mine, taken from web.