Medical schools want students who will be happy and do well in their program. This question is asked to see if you are a good fit for their program. The best strategy here is to outline things that are helpful to your learning style or cater to your interests. Some things you might want to discuss include:
- Class size (larger classes offer greater diversity of opinions, smaller classes tend to be more tight-knit)
- Teaching Style/Didactic learning
- Opportunities for Research
- Electives/Away Rotations
- Early clinical experience
- Location (proximity to family and friends; urban vs rural environment)
There really isn’t a wrong answer here (unless you’re trying to impress a particular school and you describe the exact opposite of their program). The biggest mistake is not having a definite list of wants for your future academic institution. This will make you seem like you are not serious about going to medical school.