Your work location should drive your selection of living arrangement.
Psychiatry residency: I'll guess Baylor, UT Southwestern, or Parkland. Those are all closer to downtown Dallas than anything in the suburbs, so any neighborhood or apartment complex (safe, convienent, affordable - pick two) north of I-30 and south of 635, west of 75 and east of I-35 will be tolerable.
DART is great, it is clean and efficient; but it's usefulness depends entirely on your starting point and your destination. It does not offer a comprehensive means of moving around the area in a timely manner. (I used it for four years to commute. That was possible because I had an apartment a short walk away from the station, and the job was likewise a short walk from the station on the other end.)
Public transportation is not a viable means of transport in DFW. Look at me: Public transportation is not a viable means of transport in DFW. You will need a car.
No snow. We get ice more regularly than accumulation of snow, so we have limited equipment or facilities to clear streets. Winter precipitation = armageddon.
End of April until end of September it's hotter than a two-dollar pistol, so outdoor activities are very limited.
Tex-Mex is distinct from Mexican food. Both are good, but it's not the same thing.
Liquor stores are closed on Sunday (and New Year's day too, I think).
Entertainment districts are spread out:
- Deep Elum
- Lower Greenville
- Addison
- Plano Legacy