I lived many years in Paris with a girlfriend - behind Montmartre (19e arrondissement).
Best is being with fast transport (metro) to Gare du Nord, then RER trains to CDG T1 or T2.
Or consider living close to Roissy area, but you might need your own transport.
I hate surface transport in Paris (buses etc) because of traffic delays.
Trains are better (unless strikes) and inexpensive.
Roissy "country" area near the CDG airport is a delightful place to live.
While Paris (city) is expensive, the "country" is still affordable.
xxx
Happy contrails