Too far will not keep me from returning to a match. Neither will targets that are small, cut into odd shapes or that are too big. What will keep me away are targets set too close. I've seen targets set 6 feet from the firing line. I don't care how the steel is angled, targets at that distance are TOO darn close and If I'm aware that they are that close I'm not showing up.
Target sequences shouldn't be so complicated that they are P-traps, That said Variety is a good thing.