Well, here at SEN. Most of us know that average B.Net player has the intelligence of an 8 year old. They also have about us much patience as one too.
As for your map, it depends on the audience you are trying to reach out to. If you would like to make B.Net players happy, make it easy, stupid, and very repetitive. If you are trying to make SENers happy. Show off what you know, add cool effects with triggers, innovative terrain, in depth stroyline. A map that makes SENers want to play it. It is hard to come up with a map like that, but, one way to make people happy is to just do it.
One thing you can do is take a look at
this.Hope I helped at all...

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I am pretty sure that the average bnet player is an 8 year old.