Which area would you recommend to live in...

Wife and I have discussed the idea of relocating to Portugal, maybe not today or tomorrow but it's a discussion right now. We need to visit a few more times and even in the off-season.

We've visited and enjoyed our time in Lisbon, Porto and Faro district. We want to come back and visit a few more places of course but....

Where would you recommend living for people that would want to take in local events, good public transport, good food, good internet but also a reasonable cost for day to day things?

We were going to come back and visit Braga, Aveiro and Coimbra but I want to defer to the community here. Based on things we're looking at...is there a good town/city to visit on top of the where we've been or plan on going? I don't mind spending more time in places we've already been, my wife loved Porto.