Steering wheels question??

So, is their a purpose to a smaller steering wheel?
15" seems fine to me, but would would the point of a smaller wheel be?
I do have power steering as well. I haven't ordered anything yet, just checking out e-bay and stuff. Everyone seems to like the good ol' Tuff Wheel yet, huh?

  1. Personal preference appearance-wise.
  2. More room to get fat thighs between steering wheel and seat (LOL)
  3. Reduce over-assisted weighting of steering. (Reduces "numbness" of power steering.)
  4. Not so much a smaller wheel issue per se, but many after market wheels are not deep dish as the stock wheels. This moves the rim of the wheel farther from the driver's chest.