I love all types of trees, but I especially love solid, sturdy tress that seem to withstand any time. I guess if I had to choose, I would say, Oaks, and almost any form of Christmas type tree, including Spruce, Pine, Cedar, etc.
It saddens me when we have to rid our small yard of any tree in it, mostly because of telephone wires, or the like. Every tree deserves to live! <3
This is a pic of one of the lighter shades of Maple we have in the yard. We have a few of these in pots around the yard, some of which are dark gorgeous deep red right now. Breath taking! Wish I had a pic to show.
I too love oaks and maples and many of the European deciduous trees. I'd love to see more pictures of the trees in your garden!
If you're keen on writing up a wiki article about the trees as well, I think that would be cool. Just take a few different photos and include some of the basic information :)