I've been arguing with myself for over a year about pursuing citizenship here in Costa Rica. I've put in the time, which is 7 years, why not get something for it?
There are a lot of benefits, such as drastically lower health ins. premiums (like so low they fall into my budgetary noise), a free 10-year cedula, easier banking, ability to leave CR and return at will and return of my $200 residency security deposit.
I've also been told by those who have gone this path before that many everyday transactions that involve use of ID become somehow easier because you are no longer a foreign contaminant in the eyes of Ticos, especially those that control various process gateways. Doors open that swung with difficulty before and the wheels of bureaucracy in general suddenly present less friction if you are perceived as "normal." Those benefits are rather intangible to me at the moment.
And, of course, one mustn't overly discount the "coolness" factor of having dual citizenship and that inoffensive passport when visiting certain places disagreeable to the latest U.S. meddling around the world.
One drawback that I was hung up on for a while was the name change thing.