Ocean or large is about different attitudes to usage. My preference for ocean style comes from focussing on comfort and control during the long hours of paddling rather than a few seconds of more convenience entering and exiting the kayak. Objections to ocean size is often that it is harder to enter (which it is, but after some time it is as effortless and safe as with large holes), that you might get stuck (which you don’t – water and mild panic are formidable lubricants). The good things are that it is easier to find a comfortable position and change it (no thigh braces and rim in the way), the kayak control is improved (you can find support for the knees anywhere under the fore deck, not only where you have positioned the thigh braces), that it is easier to keep dry (a small roundish rim creates better pressure on the spraydeck or tuiliq hem than the long large-radiussed sides of a large cockpit) and that you get the chart and compass closer to you (I can still read at least the larger fonts on the charts without glassesor lenses).

Some good points there! ;-)

One more....
A 'keyhole' kayak cockpit does allow me to put my knees in the middle in calm-ish conditions and that makes leg drive and rotation easier and more effective. After paddling a surfski a few times, I notice the difference in propulsion efficiency.