1. to to do something regularly, or to enjoy something.
2. to take part in a competion.
Having said that, your question makes sense if we consider definition No. 2.
As for definition No. 1. your question doesn't quite work. You don't a person 'what he would like to be interested in', do you?
The question should be rephrased: 'What do you go in for?'
Hope this helps