I cannot say I've actually been, but I have had a friend who has lived their for much of her life... she talks a lot, so I've been privied to quite a bit of information.
*If you plan to live in central Portugal (away from the beach) you can expect temperatures to rarely dip below 0°C and rarely get above 20°C.
*January is the chilliest month, and I doubt t-shirts would be sufficent.
*It's a bit rockier and more mountain-y than most people think.
*Lisbon has quite a Heroin problem right now, but I think it's gotten a slight bit better as of late.
*Taxes are quite a bit lower than in most of the EU, which might have something to do with the financial hiccup they are in the midst of.
*Because of the financial issues facing Portugal today, you can probably scoop up a nice property at very resonable price.
*Portugese are generally very friendly and open, they like to talk a lot (so she says) and love good food... especially seafoods.
---Even though you say you aren't one for culture/history, it's rather impossible to resist Portugal's storied past, as Portugal used to be one of the wealthiest lands of the world, due to its sea-faring Explorers and the like. The Calouste Gulbenkian Museum in Lisbon is one of the world's finest. I cannot recall but I think that there is a maritime sort of Nautical themed museum also that is quite famous nearby.
I hope that's helpful... You are so fortunate to have the ability tp just pick up and move to a different country. I am very jealous. Good Luck to you if you do!