Such lists differ from one person to another but as far as I know these countries:
1. Amsterdam: I like the quiet European cities where you can think about your projects, as the society is open to pluralism, there are some successful projects launched from that city like BitFury.
2. Dubai: You can find everything you want in this city, an excellent place for all projects, although I do not see incentives for [Suspicious link removed]pared to other projects.
3. Ljubljana: Small town and Bitstamp exchange headquartered in that town.
for others ASK GOOGLE
Ljubljana is a quaint little city with so much going on in terms of tech. They're less heard of but the people there are quite forward thinking and adaptable to new things. I'd say Tallinn might be along the same path as well, but I haven't been there in a while.
More and more cities are starting to get bitcoin shops selling coins for cash, so I imagine that projects wouldn't be so hard to get going. Check out Berlin, Istanbul, Amsterdam, and ask around there a bit. I think the best thing you can do is get on the ground level and then go to these shops and ask people what they've been up to lately.