There are a lot of islands here. There are the small ones that one or two people live on that the gov owns but it leased to people for 99 years. Those people that lease are usually super rich so hire people to watch it for them. Then there are larger islands like Ilhabela and Ilha Grande that have towns and such. I've never been to Ilha Grande, but I can tell you that while there are a lot of people here, there isn't much in the form of regular entertainment in the US sence. No movie theater, bowling, nothing...
There are lots of outdoor activities though. Sailing, swimming, drinking, sleeping on the beach, ... you know normal stuff. All internet here unless you get satellite sucks. You can look at their poles where the lines are to see why. I wonder sometimes how they got it to work in the first place unless it was just by trial an error. "Well that cable line sitting right on top of the main power line and holding up a street light is doing just fine. I don't see why YOU have a problem..." Well, it's not like that everywhere, but it is like that in places. There are brown outs and spikes all the time. .. If it wasn't a paradise and if I wasn't married to a person that lives here, then I wouldn't live here. Visit... hell yeah, everything seems to magically work fine when the tourists are here (something about affecting the cash flow), but living here is a pain.
Things are more expensive too. Cell phone rate are monsterous, and tech prices although not as bad as 10 years ago (I bought a PDA for about US$200 in the States, and it costs US$900 here in Brazil) they are still a little higher in some areas..