How to interact with a police officer(s)

Most LEO pull you over for tailight to see if they smell booze or weed, they already ran your tags or have them called in when they walk up to you. If nothing fishy, maybe a warning or a small fine or 5 day warning "get it fixed" card. I found out years ago it helps to not drive a POS car that looks like a 17 year old pulled it out of a junk yard and sprayed a case of rattle can primer on it. Those cars are ok...when you're 17 ... at 40 not so much LOL! Really an old car that is in good shape fits in well also they don't get hassled much. Last time I got stopped I had expired tags, I said to the cops "I have multiple vehicles sometimes I forget..." He gave me a warning and I said "Ill take care of it as soon as I get home..." no fine ...but I was sober ,had insurance, no warrants etc. Pa did away with the stickers so I never know when my cars are due registration unless I think about it and check...that piddly nonsesnse is just money it isn't like I'm a criminal..and any time they stop me I always have the money to update the tags.