[vlehto]

This was my first thought too. MBTI is not considered "scientific", by psychologists. But r/ENTP in reddit is filled with people who seem to suffer from extreme novelty addiction.

Other possibility would be ADHD or some weird version of autism. ADHD would often have difficulties to stay focused even in new things. Autistic are often very picky about their interests and get easily bored about everything else. Which isn't exactly neophilia, but might appear like it.

https://www.reddit.com/r/ENTP

[tvm]

Yes, it's not "scientific", but generally categorizes people with similar behaviour quite well. If you know your classification then there's a fair chance that there are more people that have same problems as you and gives you chance to read about their experiences and solutions.