LU: It depends on “where” you are. EY, US, or some other country. Even here in NYC you will see that almost every minyan is different. Most “yeshivishah” minyanim will have men wearing jackets; other types of minyanim will have men wearing jackets, windbreakers, or no jackets at all. The president of my shul generally is the shliach tzibbur and he hardly ever wears a jacket. In addition, many sephardim don’t wear jackets. I don’t often agree with “kj” but he is correct when he says ” better be a ehrliche yid who goes to shul with ur work clothing”.
I personally wear a jacket although my father A”H generally did not.