In the orchard, I have a yellow delicious apple, a red delicious apple,
a winesap apple, 2 macintosh apple, 2 Stanley plum, 2 greengage plum, a sweet cherry, and two apricot trees.
In other areas I have Nanking cherries, choke cherries and a couple carpathian walnut trees that don't seem to like the climate. I don't know if they will ever make anything. I also have one small black walnut tree and three small peach trees. Time will tell if the peaches make it.
When choosing fruit trees, yes, choose something you like, but more important is look at its hardiness rating and see if it has a good chance of surviving your winters. Peaches are borderline here and I have had trees get to bearing size then we get a 20 below winter and they die. Sweet cherries are borderline here, but my one tree has done ok so far. I am hoping for a few cherries this year.
The apples and plums have done really well here.
I have looked at those grafted trees with several varieties on them. That may be a fun tree, however if you lose a limb you lose the variety. It would be great for a small lot.