[KevinFromTexas]

I think one other reason is the bird issue. Deciduous trees create a canopy that might cover an area and might present the problem of bird poop. Tropical palms like those tend to be less of a problem since they have smaller canopies. Our Mexican fan palm, though, always has birds and squirrels that nest up under the dry fronds. I'm always pulling weeds and digging/cutting out unwanted sapplings they've inadvertently planted.