I agree with Chevman. It does sound like she's running a little on the rich side. What does the exhaust smell like? That's usually a pretty good hint as to what needs tweaking.
I'd check for carbon on the plugs, too. That'll tell you for sure whether or not you've got an excess fuel problem.
A tune up will never hurt anything, though. I generally give any engine I'm waking up after a long nap a tune up anyway -- just to make sure that she'll fire without ****ing me off.
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Something else that might cause grey smoke:
Did you have any head work done? Sometimes that coating they put on there makes copious amounts of stinky grey smoke. It usually burns off pretty quick, though. Usually within the first 10 minutes, but sometimes -- if it's cold out -- it takes a few more minutes for it to get hot enough to burn off.
