The old AL II or Lama seats are the best.
In Summer no sweating and in Winter nice and cosy with a sheepskin in the back.
The worst are the Hughes 500 seats. I'm 6'2" and like a fellow pilot said "you sit in there like a Fox on a squat loo"
.
Nothing against the 500, it's a nice bird to fly.
Cheers
Spenc