I don't have a Grapefruit and I want to get just one. It will be grown in a pot in Arizona, but I want the concensus best!

According to "Citrus Varieties of the World", the Duncan grapefruit is the original parent of all other varieties, and is unsurpassed for flavor.
Apart from that, rootstock might be as important as the scion. My grandparents had an old tree, the fruit could be eaten straight off the tree.
Later we found out that it was budded onto sweet orange stock, when a sucker was left to fruit.

Oro blanco on Seville sour or Flying Dragon if a dwarf, If your going to use FD make sure you neutralize the salts in your area for all Trifoliate rootstock you use, if your container growing your city water has high amounts of salts in it also, look at acidifying your water. In the ground add gypsum each time you fertilize and leach the salts down by hydraulic pressure.

Thanks turtleman, hay if you have any unique types or happen across any variegated citrus beyond the standard pink lemon let me know. I will buy it from you.

W0W, I don't even have a source for variegated stock, The only thing I could do is sneek into Lazz's yard, hog tie that monster dog he has guarding everything and rip his trees down to the nubs, and sneek back out with all the buds

Ok, well just let me know. Anything interesting, I'm interested. Rare types, Microcitrus,variegated. Everyone is raving about the Sanbokan lemon, so that's another. Just if it comes about! keep me in mind.

The "Duncan" is the easiest and most reliable of Grapefruit to plant. Some of the original seedlings, planted in the early 1800's still survive in the Tampa Bay, FL area. Many old "volunteer" (Duncan) grapefruit still live on the grounds of old " Florida Cracker" homesteads. You can plant the seeds of most grapefruit and you will probably get a Duncan...if you live long enough!

Memories from my youth when we ate fresh mullet and grits for breakfast.

tloeb

Whatever variety of grapefruit you decide on, the longer you let the fruit hang on the tree the sweeter it will become. I have a Marsh grapefruit, which is a white commercially seedless variety. At one time, Marsh was the most grown grapefruit in Florida, before the advent of the red and pink grapefruit varieties. I leave them on the tree for a long time before I pick them, and they become delicious. Leaving most any grapefruit variety, hanging on the tree for an extended time, they will taste much better that the ones available in the store. Millet (1,266-)

I've never really liked Grapefruit, too tart for me, but since I'm obsessed with citrus, I figure I need one. I guess the collecting thing is getting me bad. Seems it's Duncan or Oroblanco have been the suggested.

I think Flame has the best color, flavor, and fragrance. This year some critter got two off of my tree the day before I was going to pick them.

Duncan
Oroblanco
Flame
Marsh

Are any of these more enjoyable or more ornamental than another just from the growing point of view?

All of those will grow about alike. The pigmented ones will have prettier fruit, once they develop their peel color.

A slight correction on tloeb's comment -- 'Duncan' does come true from seed. Other grapefruit also come true to their own variety from seed, NOT reverting to 'Duncan'. The exception is 'Thompson Pink', which produces 'Marsh Seedless' seedlings, and I seem to vaguely recall that Oro Blanco may be monoembryonic, but don't quote me on that -- it's not a Florida variety, and I'm not at all sure. In any case, it's the one that is not a true grapefruit, since it is a pummelo cross.
Malcolm

If you dont like eating grapefruit so much, red varieties might be more suitable for you.I probably wouldn't try to compare red and white vars as the flavor is quite different. Depending on how warm your summers are, you should get attractive mild tasting fruit. As stated Oroblanco is a hybrid,and falls a bit too in between white grapefruit and white pummelo in this areas climate. True grapefruit and true pummelo might be better choices.

Has anyone got opinions on "cocktail grapefruits" etc which we dont seem to have in Australia ?