A lady friend-for-an-hour of mine PMed me and asked whether I'd like to get together sometime this week. That's the first time in 15 years of hobbying that I can recall something like that happening.
Unfortunately, I won't have the opportunity. But she made my day. Not only that, she guaranteed who I'll call first when an opportunity arises, not only next time, but for my next several times.
I know it's business, but I doubt she's lacking for clients. And even when it's just business, it's nice to be able to think that your business is appreciated.