MasterUSA said:
Formality if your case is straight forward as in no tickets(DUI),no arrests,no travel to coutries that on watchlist, no divorces etc. Otherwise you are in for the pain of your life!
and....if you broke your (continuous) residence, did not file your taxes, acted as non-resident, have "fishy" immigration history, voted, claimed you are US citizen, lied about something, did not register for SS....etc.etc.
This interview is no formality and I would not understand it as a "lame" session. For example, IO will review all your files and can question, re-examine, ask for more evidence and judge all the previous immigration rulings. In other words, you can go to the interview for a citizenship, and complete it without GC.
I can say that I had the most straightforward case (interview less than 10-15 minutes), but I was very prepared.
In terms of postponing your interview , please read the other thread.
Do not know your personal reason....You know the best....And as you said, you need to make a decision. However keep in mind:
1) Please do not consider
USCIS as a commerical busniesss trying to adjust to your needs and willing to go 20 extra miles to satisfy its customer. You need to shift your understanding and think about USCIS as a government agency dealing with an extremely important issue - immigration.
2) In any case, if you decide to postpone it, you will be faced with (1)
delays (for sure) - can range from 2 months up to 1 yr; (2) potential
confusion with your USCIS records (things like USCIS thinking that you did not show up for your interview and closing your file....and you having to spend extra time, energy and patience to correct these administrative mistakes) and (3)
unpredicability - next interview will be based on USCIS time, not your wishes, i.e. might be in a bad space again.
3) So If I were you, only
MAJOR EMERGENCY (medical, acts of god, death etc.) could prevent me not to attend the interview.
Changing a tourist airline ticket (for fun or familiy visit) would be at the bottom of my list of priorities no matter of cancellation/changing fees.
The citizenship interview is ONCE in your lifetime (hopefully) and I would do all humanly possible to attend it.
Good luck!
P.S.: I'm not a lawyer or an immigration expert. I'm just an ordinary guy. You are soley responsible for your actions.