I have been loading for a long time as well, since I was 12yrs old. I started using RCBS andther is nothing wrong with them. they are good dies, but over the last 8-10 yrs, I've been acquiring more Redding dies. They seem to me to be a little higher quality and the adjustments are easier to make on them. I like the Hornady dies as well, but prefer the Redding. I have 11 sets of RCBS, 5 sets of Redding, 1 Hornady. and 1 Lee pistol dies.
Ifi I had my way all would sets would have Redding Bushing sizer dies and Redding Competition Seater dies.
I am needing a set of custom dies this year and I'm having Hornady make them due to cost and turnaround time.
I guess it's ultimately a decision of personal preferance.