Probably the longest tenured member of my top 5 most desirable women list, 10 years at least:
In fact, I'm surprised I haven't posted this in this thread already (search turned up nothing).
Anyway, without getting too wordy - super intelligent and very grounded in spite of her fame and wealth. Like I said before, that is 90% of the game in my world. Add in her physical beauty and you have a Top Five woman for sure.