Consoles are made of explodium.
Holodecks seem to have been designed just to give the engineers something to do, as they're constantly breaking down.
Dangit -- you took two of my things! I mean c'mon -- they can travel hundreds of times faster than the speed of light, slap around the laws of physics every time they use the transporters, but they can't build consoles that
don't explode? That always annoyed me.
As for the holodecks -- they don't just break down. They malfunction. I mean, I would give anything to have a real holodeck, but if it continued to malfunction and nearly result in my death half the times I used it, I'd probably find some other way to waste my time. Just the "malfunctioning holodeck" episodes from the top of my head: The Big Goodbye, Elementary Dear Data, A Fistful Of Data's, Ship In The Bottle, Our Man Bashir, Heroes and Demons, Projections, Real Life, Worst Case Scenario, Bride of Chaotica, etc.
Also there's the standard "character becomes obsessed with a holodeck character" episode. It happened to Geordi, Barclay, Commander Riker, Odo, The Doctor, 7 of 9, Tuvok and Harry Kim, and once again, those are only the ones I can remember from the top of my head.
And of course there are the "going on shore leave and falling in love with a mysterious alien" episodes.
And why is it that virtually any two species from the entire galaxy can have a child together? Although this issue was addressed in the classic South Park episode An Elephant Makes Love To A Pig...
God I'm such a nerd.