Personally? I love leghorns. But I already have silver and red... they keep me in eggs. You can't beat leghorns!
Oh I love my leghorns! They are so dependable and they don't eat nearly as much as most of my other birds and they lay bigger eggs! Mine aren't that shy or spooky. I would really love to take more eggs but I can't for a little while because I have eggs stacked on eggs right now.
I wish my darned bantam cochins were laying more and that I could be 100% certain they were pure(only 90% certain), because I would love some leghorns. Thats one color egg I don't have yet, well at least in large fowl.