I was almost exclusively a Hornady interlock fan.....then went to ballistic tips and now use more accubonds than anything....I also hunt with Northforks and A-Frames.
My reason is that I want two holes in the target (if I can get it) an entrance and an exit hole.....and I want the bullet to stay together to accomplish this.
I fully agree that this isn't required for deer.....it's mostly a waste of money.....but I have them for elk and other heavier targets and lets be honest here.....I only shoot a few rounds at big game every year.....I actually can afford the extra $10.00 a year it costs.....
BTW.....I usually practice with standard cup and core bullets....