Actually, I'd go backwards and ask yourself some questions.
1) What do you need to stay happy and sane? You're going to have to live at this place for 3-4 years of your life, so it's important that you can work there. Do you need quiet residences, or would you rather have some parties? Do you need a local sushi bar? Do you need a good fitness centre? Do you want to be in a year-round warm climate, or do you want some snow? What support networks and services do you need to tap into? (A women's centre? A GLBT centre? A daycare? A Christian association?) Do you need a variety of vegetarian/vegan food at the cafeteria? Do you expect to be able to play intramural sports? Think about this, suss out your top priorities, and then ask these students what their programs offer.
2) Think about what style of program would suit you best. There are two extremes in terms of program design:
- Theory-based, which will have you working on a minimal number of productions, with most of your time spent studying the theory and practice of theatre in classroom settings.
- Conservatory, which will have you constantly working on productions with hardly any time spent in classrooms.
Most programs exist somewhere between the two. Just because a program offers more productions does not necessarily mean it is "better"--although if you're a hands-on, let's-get-going type of person, it might be a better program for you. Conversely, theory-based programs will usually give you a broader understanding of how theatre comes together: in a Conservatory-driven program you might only ever stage manage, while in a theory-based program you'd be expected to take classes in every discipline and field, at least a the theory level. Think about which type suits you better, and use that to generate questions about the programs: "How many hours a week will I spend in a classroom?" "How many production credits can I expect in any given year?"
3) Decide how much you want to specialize. Even if right now you're REALLY REALLY SUPER REALLY into theatre, it's important to remember that it is possible to over-specialize. (Theatre in particular is an industry where you may find it beneficial to take some non-theatre courses: having a handle on psychology or history or philosophy can make your work much more interesting and relevant, and make you much more useful as a professional, than having a theatre-exclusive background.) Different universities offer different degrees of specialization: some will offer virtually no elective credits, others will actually give you more elective credits than in-major credits. Decide what sort of mixture works best for you, and ask about what the ratio is at these programs.
At the risk of saying something negative, it's also important to remember that a lot of very good people try and get into theatre as a lifelong career and just don't make it. You may need to exit the industry at some point, and having a more varied background in your education will be beneficial if it comes to that.
4) Finally, ask about the local theatre scene. You'll want to see shows while you study, and you'll want to see shows by people who you don't see every day in the halls. If your university is basically the only theatrical output in the region besides the annual Christmas pageant, that might be problematic. This wouldn't be a deal breaker for me, but it may be for you, so think about it.