If you had a specialty as a Tech Support Specialist what would it be?

Technical Support generally is based on levels (I, II, III, etc.) and as the levels go up, the complexity of the calls increase and the volume decreases. Higher complexity requires a deeper knowledge of the product and an ability to work in-depth and 1:1 with the customer.

The ability to dive deeper also requires stronger abilities to document customer issues, work from your own knowledge (VS scripts for front-line support people), and potentially interface with the company design, product and development organization.

More senior support role duties may also include training of new specialists. The desire to be a trainer (formal in classroom or informal 1:1) should interest you if you say a "I want to be a level IV rep."