I will be living in Poitier for a period of six months and wanted to know which area or areas I should avoid when looking for an apartment.
Poitiers is a pleasant small city. There is no high crime at all. Of course the most agreeable accommodation will be near the historic centre. But with all due respect,if you have the attitude, or the fear, that (in any European or American city) certain kinds of places and certain kinds of people are "bad", well, you'll find them everywhere, and it would be better to stay home. Enjoy Poitiers, it's a good place.
It's a very nice place, we visit a lot. as already said, the 'nicest' part is the old city centre and some districts have housing that looks a bit 'worn' but other than that I would say it's about as good as you're likely to get in any similar sized city on France