No regrets; many, many unforseen and unplanned advantages as well. I'm a much better hunter, and the trad/primitive is simply better equipment for the way I hunt (awkard positions, no need to range estimate, etc). Aside from that, I have gained much enjoyment and understanding of the world around me from the nature of the hobby/passion. All around, so much better.
That said, I have nothing against modern archery. I have friends and family who like it, and are plenty ethical, responsible, etc. I just think they are still missing out on some potential fun.