Top 3 factors if your goal is to move on to greener pastures:
1. Cost of Living- Training sucks on its best day, let alone making AG pay and being borderline-poverty level.
2. Success rate- While very few low level/academy grad facilities have terrible washout rates, a lower success rate might key you in to what type of culture/environment you'll be walking into at your facility.
3. Staffing levels- Learn how to read the PPTs and utilize them to your advantage. Sure you might be able to pick that high level 7 up down straight out of OKC, but who cares if you're going to be stuck there for 5 years. In reality, the agency is doing a decent job constantly refreshing the academy list to adjust academy placements for the ever-fluid staffing numbers now set in motion by ncept.
4. (Optional) Facility type- This is very person-specific. If your only goal is to checkout and move on, find you a level 4 or 5 tower only. If you want a radar ticket, find a cheap cost of living facility with good checkout rates.
Most importantly, don't overthink it. I remember back in my preacademy days I had spreadsheets ranking facilities by many variables, only to find myself on selection day choosing between a level 7 tower only in a place I'd never be able to afford to raise my kids, a level 5 up down in a place I'm certain crackheads outnumber college grads and where you get 3 feet of snow a year, or a level 6 up down in higher cost of living area furthest away from my hometown family. So low and behold, here I am shovelin' snow with the crackheads...
Best of luck...