Sounds like my story. When I "accidentally" hatched some heritage birds I was hooked. Bought eggs off of Ebay. Haven't looked back since.flewdacoop, You are not being dumb. You like a lot of us on here are just not as well learned as some of the ones that have been raising the heritage lines for a long time.
I have had chickens for many years and when a kid, my parents always had lots of them. They were a mixture of many breeds that mom and dad had for eggs to feed our family and sell a few eggs to help pay the feed bill.
A couple of years ago I got 25 pullets, 1 cockerel RIR from McMurray hatchery. I raised them for approx 6 months and got to lurking on BYC and saw what the old time RIR's looked like. WOW, I was hooked. I started reading up on them and trying to find out which were the top lines. Anyway, I now have some gorgeous juvenile RIR's growing up and hope to have a couple really nice flocks of them in a few years.
My hatchery birds did supply me with lots of eggs and I enjoyed them but just decided I would like to raise the old time strains.
Be happy with what you have and if you decide you would like something different later down the road, get yourself some of the pure, old time birds and you will see the difference. I don't think there is any difference in the taste of the free range eggs no matter what color the chicken is. lol They are all good.