Welcome to the Delta Forum, FreqFlyerPhil
Your question is very broad and so I suggest looking at about one month's worth of forums to get the feeling of why so many on this Forum want to keep Delta (their) Delta. Once you have read the many posts from DL loyalists and detractors, you will be in a better position to decide if you want to "make Delta My Delta."
Obscure2k
Delta Moderator