Clint on Trees

I think Weeping Willows are lovely. So lovely that I want to plant one. But it's always good to talk to people about things before you do them so I asked Bert's old school chum Clint who happens to know a thing or two about horticulture. I said to him:

Clint, do you know anything atall about Weeping Willows?

Aye, says he, Take nothing to do with them!

And then he proceeded to rant for about half an hour on the nuisances of Weeping Willows. So what kind of tree would Clint have me plant? When driving down to the Rare Breeds Show in Omagh, Clint commented,

That's a lovely tree.

And why's that Clint. Why is it a lovely tree?

It's that round.