The weather sure helps. Leaving a country with 200 days of rain per year for one with 300 days of sun ( rough estimate ) sure makes a difference. I also have a twin sister, who used to have a Portuguese partner. I have a strong bond with my twister and my niece and nephew. They decided to move to Portugal, back in 2018. I had already tried living in Spain and spoke Spanish, so I decided to give Portugal a try, this time. I stayed.
Also, life in The Netherlands ( for a creative like me ) was impossibly expensive and I struggled loads there, feeling quite depressed and totally burnout. Plus Portugal has mountains and The Netherlands hasn't.
Need I go on? ;<)