I'm not so makpid on amud if im traveling or in another shul that has a chiyuv.
Along this vane (and probably slightly OT) - While I had no problem taking the amud in the shuls I was already comfortable with, I had a hard time taking the amud in other shuls, that I just happened to be davening at - for a lot of reasons:
- Minhag and nusach would sometimes throw me off, or make me worried that I'd mess up. (i.e. someone who usually davens ashkenaz davening nusach sefard for example)
- Speed - I don't know which is worse, being the chazan who is too slow in a speedy minyan, or the speedy chazan in a slow minyan
- Hat and Jacket requirement - I know that this statement will illicit various opnions, but as someone who doesn't wear a hat (not since I was 15 or 16) and doesn't regularly wear a jacket, I felt very uncomfortable leading a minyan that required me to do so. Not because I have a disdain for it, and not so much because I'd probably need to borrow a hat/jacket from a stranger, but because I didn't feel I was ra'oy to be the chazzan. It's not that I don't feel frum, but I feel that a shaliach tzibbur should be someone who truly reflects the olam. By me putting a hat and jacket on to be the chazzan, is me simpling pretending to be something I am not to get a desired result. I don't become a hashkafic black-hatter so to speak by putting on the hat and jacket, and I felt that made me unfit.
I understand that many suggest it's a kavod hatfila thing - appropriate dress for someone leading the amud, and that the only condition is that I am a shomer shabbos erlicheh yid, who knows how to lead davening, I still think that if your shul has that minhag, they expect their baalei tefila to be something that I am not, and it's disingenuous to pretend even for saying 1 extra kaddish.
That's not to say I never did, but there were times where I backed out of taking the amud, and I always had a chip on my shoulder about it.