Interestingly this also paves the way for Fernando Lugo (ousted by Congress in 2012) to run again, and from what I've heard he's still quite popular.
So Paraguay had the same system as Mexico (you're getting one term and you'll never have another)?
Yep, as do quite a few other Latin American countries. Anti-dictatorship measures.
I know Guatemala had this system. So does Chile, except in Chile you can be elected to another term after waiting out, same with Peru.
It's more interesting how many countries had one-term limit but abandoned it (Brazil, Venezuela, Bolivia, Colombia...) under Democratic governments. Itamar Franco couldn't run in 1994, despite having freaking 80% approvals.
Of course, some dictators were never bothered with formal term limits, ruling, while out of office, throught figureheads, like Trujillo or the Somozas.
Personally I like the principle "OK, you've got your 4/5/6 years, so better use them wisely."