Help with choosing a tradition is likely to be opinion-based. For instance, I have seen the same reasons used for choosing Mahayana over Theravada, as the opposite (Theravada over Mahayana).
However, asked in a more specific way, these types of questions could be helpful. For instance, asking for fact-based comparisons of certain (limited scope) aspects of the traditions may be helpful and less subjective.
On topic, choosing a tradition also involves finding a teacher that is suitable for you - you have to try them out (both tradition and teacher). There are a number of questions already about different traditions and teachers, letting everyone make their own informed choices.