Well, scanning fungi on an alien world would make for a pretty boring game.
Sisko: If all we find is some fungus, we're not beaming down.
Dax: But what if it's smart
(from "Children of Time")
In all honesty, I wish there were more non-combat missions too. Some of the featured series have nice ones, but the regular missions do get a bit repetitive after a while if they're mostly combat.