I think it's fine. Most people your age will be wearing crappy shoes anyway, and a lot of people in "business" do not have a great sense of style. The only time I can imagine someone caring is if you wore something that was really attention grabbing, like a velvet jacket, bright colored shoes, torn/beatup shoes and clothes, etc. Other items, while not necessarily "inappropriate", that could affect people's impression of you would be things like bow ties or any other item of clothing that has some kind of social stigma attached to it.
I know this has been discussed before, but as a younger guy (mid 20's), I also avoid pocket squares during interviews, as people almost always notice it, and generally speaking, I don't want people to notice my clothing (other than the fact that it fits well and I look put together). I think the older, more credible/established you are, the more you can get away with affectations in business.
Just my $0.02.