My problem as a 15mm gamer is, that a lot of rule sets in the modern era are to detailed. I need markers for lying, kneeing diffrent wound status and so on.
This is ok on an 28mmm table/figues but in 15mm...
I loved the old Ambush Alley rules, they were a little bit abstract sometimes, but I had all the modern stuff/hardware rules like drones for example.
And it was easy to get new people into it on conventions for example.