I really enjoy the McVie / Welch / Kirwan era. "Future Games" and "Bare Trees" are two of the most easy-going cds I believe I own.
One of my fave songs from this era tho is hands down "Future Games"! Welch really hit it out of the park with this one. I also love "Sentimental Lady" and "Emerald Eyes". Those always garner a replay.
In that same category as far as (my hero) Christine goes, I would probably have to say "Spare Me a Little" and "Come a Little Bit Closer" just for starters. Then again, she could basically sing the phonebook.....
Her voice has been and still is amazing.