It's already legal in my country (Netherlands) and I don't mind it at all. It doesn't cause any problems over here, it's quite beneficial in fact given that a large amount of the tourists that come here are simply looking for some weed. People who are high are the least dangerous people I've ever seen, they're always just enjoying whatever comes up tot their mind. Smoking weed isn't even a taboo here anymore, especially in the major "drug"-cities like Amsterdam and Zwolle.
The lads and I get some every now and then too. People react in different ways to it. One of my buddies just starts talking about all kinds of scientific crap and the gazillionth dimension and whatever. I myself usually get silent and start enjoying the most random thing like a flower waving in the flipping wind. It's a thing I can recommend to most people. But remember that too much is obviously too much and don't mix it with alcohol on your first go unless you like to hear that story of you vomiting all over the place over and over again.