I had Erector set (actually "Meccano"), but preferred LEGO/Technic because they just snapped together, you didn't have to spend time screwing a bunch of tiny nuts and bolts together. The feedback loop was shorter.
I also had some other construction toys like Capsela. I don't think I had Tinker Toys, but they seem much more simplistic.
By middle school Technic were the only LEGO sets I was interested in (unfortunately Mindstorms came later, but I had one of it's predecessors, Technic Control Center).