Request inputs in choosing the best airline for me. I live in Manhattan (Upper East Side). I will travel 4 x London, 4 x Houston, 2 x India (Mumbai, Bangalore) 1 x Hong Kong / Singapore and 1 x Miami. All in coach. This should get me to 100k miles. Which alliance should I choose and which airline should I credit miles to? I want to get to a point where I get upgraded after I get status. Also prefer the other perks such as lounge and first class check in, but those can also be got with credit cards. I believe LGA > JFK > EWR from where I live. Does the decision change if I end up not making 100k miles. Thanks for your inputs.