Smaller and lighter paddlers seem to go really well on 14 feet.
Yes, agree with CMC on all that... including two different board designs... Flatter rockers, with "cutter" nose, for flat water, or more rocker with nose uplift is your DW selection.
Unlimited boards are generally Ocean DW Boards. But that SIC F18 is a bit of weapon in general all round conditions. Lacey was sort of saying that the long boards need more power to keep them up and running... more wetted surface for slightly more friction (?), but more water line to get them up and gliding. But the big boards are slightly harder to handle, but by no means unmanageable.
The "cutter" nose (lower nose) can dive a little when you get a good runner, and don't get back on the tail in time, to lift the nose.... But if you keep the board running straight, the nose will pop up... if you're off balance, and/or the tail gets a little nudge from cross swell, you can get "tripped up" or thrown off the board. But that is still good fun !

Getting bucked off the big bronco !

Scotty, try and get a go on an F18. There is a chance you can pick up an F18 at the end the Maui season..... But a local DC is also a brilliant option.