I originally lived on the Pacific Coast for many months and while I loved it, there were a few things that made me not want to live there:
1) the cost
2) too many tourists
3) the weather (too hot/humid)
4) too far from major hospitals and San Jose( the only "major" city in Costa Rica)
I then looked at Puriscal, San Isidro and San Ramon.
San Isidro, while having cooler weather still has the same problem of being too far from San Jose, in fact it's a very dangerous highway according to locals.
Puriscal is nice but again it's a long curvy road to get there from San Jose. That was the main reason I decided on San Ramon. I still like both of those other towns and I could live there; I just like San Ramon better.
San Ramon is only 40 min. or so from the San Jose Intl airport. San Ramon has a fairly large hospital too and "all the amenities".
San Ramon has almost anything you want to buy so you don't need to go to San Jose' unless you just want to go to Walmart or another super store, and in that case you go to Alajuela which is at least closer than San Jose.
San Ramon is large enough of a town that there is some "hustle/bustle" to it (good or bad, depending on your preference), and it has banks, restaurants, a super store or two, all the chain stores (Artelec, Gollo, CasaBlanca, Roe's, etc), a cinema, doctors, and dentists by the hundreds it seems, and it's got surrounding areas that give you a choice of climates.
We chose to live at 2850 feet elevation about 15-20 min. outside of San Ramon [ http://ranchosilencio.com] and when we go to the coast, boy, do we thank our lucky stars we live here and not there! When we had to take the car to Puntarenas for RTV inspection my wife and I were like "Thank goodness where we live is not THIS hot!" Yes we have hot days but overall we have much cooler and cloudier weather at our altitude and location.
What I particularly like about where we live is the Nature! We have a forest on one side of us, and all around us are trees, trees and more trees, mountains and a view of the ocean in the distance (Esparza, near Puntarenas, and the Gulf of Nicoya is the view from our front porch. We have neighbors but none too close at this point.
So the 2nd thing is the Views we get of the sunset every evening; and all day long the ocean/gulf, and in the rainy season we get really interesting and beautiful cloud formations and we get lightning off in the distance that is like a light show, especially after dark. The view is always changing, like hourly, in the rainy season, as clouds come and go. When it's clear which it is most nights, we get the twinkling lights of Esparza in the distance.
As to Nature we have toucans, parrots, and all kinds of interesting birds, monkeys, and interesting insects like "carbuncos" which are like the lightning bugs of the USA except the carbuncos are 10 times the size and both eyes light up! Something to see! We hear bird calls all throughout the day and some at night too, and they're very interesting. Sometimes they make me laugh and there's always a bird, or some animal or insect that amazes me in some way, every day.
These are the reasons we chose San Ramon and we think we made a great decision!
Let me add that Costa Rica is "the land of micro-climates" so you can live 1 km. away from someone and they can have very different weather than you have! It's a fact! Altitude is very important, and so is how the mountains are situated around you and what weather pattern they cause. So you can't just go by someone saying "San Ramon is this" or "Puriscal is that"; maybe the actual towns are, but living "around" a town can be totally different. North of San Ramon has completely different weather than the west of San Ramon, for example.