My partner is a 30 year old male who likes to travel, read books, cook, and paint. What are some good gift ideas for his upcoming birthday?
There are a lot of options to consider for your partner based on his interests. Below are a few suggestions:

1. Art class
2. A wine and paint experience
3. A couple cooking class. Ex: Gnocchi making class
4. Plan a surprise trip to his favorite destination
5. Gift him a book on his favorite topic
6. Gift him an audio book subscription

Most important part of the gift is to showcase the effort and make sure you both have a good time!