I am eagerly awaiting indoc on 4 April and am troubled by my lack of knowledge on how to make a decision about what aircraft I would pick if given a choice.* I live near Atlanta, so that is my desired base.* I would choose a non-ATL aircraft with a plan to AE to Atlanta if there is a compelling reason to choose one aircraft over another.* I'll admit that I am a military dude that is looking to raise my general knowledge from "embarrassing" to "basic understanding."* A few questions that come to mind:

1) Can someone explain the 73N and 7ER relationship?* I assume 73N = 737-700 and 7ER = 737-900 ???* If this is the case, do pilots bounce between the various versions of the 737 or is each version treated as a separate category?* How much international is available on the 73N and 7ER out of Atlanta?

2) I realize opinions vary, but in general, between 7ER/73N/717/88/320, which have more "desirable" schedules out of ATL?* I'd define desirable as not flying multiple short-hops each day, not laying over with exactly enough time to get to your hotel, catch a short night of sleep, and then rush back to fly again the next day.* Do any of these have layovers in Caribbean and/or South America?

3) In which of these planes would my seniority build the fastest once I've AE'd myself into ATL?

4) Any other useful advice that would help me make a choice

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