I'm a European, and I plan on spending 1 or 2 weeks in North Korea, a tourist trip. Will this trip prevent me from visiting any other country in the future (such as the US, as of today's regulations)?
There are several topics on this subject, but with the travel ban that has been issued by the US, I don't know if they are still relevant.
There's no formal restriction preventing you to visit the US, but given the severe tensions between the countries, some US officers may well not like the fact that you visited NK and may well give you a hard time because of it.
Bring as much documentation as you can proving that you're a regular tourist and that you'll return home, so that they have as little as possible to turn against you.
As for other countries, no one but the US is likely to care.
From my own experience (and this appears to still be the case as of 2018), North Korea does not stamp your passport. The North Korean visa is a separate piece of paper which is taken off you when you leave the country.
This means that, unless you tell border officials about your fun trip to North Korea, they have no way of knowing that you've ever been there (North Korea Certainly don't share Immigration records with the US)
Source: I did the trip myself in 2014.
