Given a choice, which city would you prefer to live in between Delhi & Bangalore

[csn]

Assuming you are clear about the very good points 'dbs' has raised in #2....
Preparing a Pros and Cons list could help you decide. Below is a list to get you started, list could grow as others chip in...

Bengaluru Pros:
1) Salubrious weather
2) Calmer people, this is a personal opinion.
3) More IT companies in Bengaluru than Delhi, this may or may not matter depending on your career situation.

Bengaluru Cons:
1) Bengaluru metro is still not as well connected as Delhi. I always prefer to use public transport if I can and makes sense.
2) Road traffic is better managed in Delhi.