It seems inevitable that all New Yorkers, at some point, go through a "I need to leave NYC" phase. I went through it, so did AI...and now it looks like a slew of others are jonesing to get the hell outta dodge for a couple o' years. I say go for it.
New York is fantabulous but it occassionally takes a few months, years, decades away to remember why. The constant milling and energy and palpable grittiness can really get under a person's skin if you don't seek the occassional respite. Of course, when it's sunny and 75 degrees and low humidity, I can't think of a better place to be.
I heart New York. Although, a winter home in Costa Rica wouldn't hurt either.