Catan is good, but with 2 expansions even better. I play the base with this 2 all together and it's fantastic. Big board, many ways to set your strategy. I love it.

Azul is very very good. One thing that is top, is that is very fast to set up the board. For Catan with expansions i take 10-15 minutes to set everything. Azul is 30 seconds.
The game is simple, to set patterns in Portuguese Tiles "Azulejos". You have different colors with different patterns and you have to combine them, horizontally and vertically. you can do your board but you have to look at your opponent to try to stop him. Very Easy to learn, very relaxing, an excellent game.