I got a few rods laying around at home and they're all mediums. Just wondering what I should use them for?

Not all mediums are created equal but I like that power for my Keitech rod. But you could throw crankbaits, smaller jigs and t-rigs. You can do a lot with a medium.

I like to use mine for wacky rigging senkos, tubes, poppers, lipless cranks, finesse jigs, anything within it's lure rating. Medium powered rods are versatile.

Wacky and bitsy jigs

whatever lure size that's within the rod's lure weight range. 

Anything about 1/2oz, give or take a quarter.

Medium action is great for small crankbaits depending on the tip.  

Couldn't tell ya..out of all my probably dozen or more bass rods I own not one is a medium. And honestly id rather be 2 powers too  strong than 1 power too weak . This is 90 percent due to my location and the cover I fish. 

I only own one casting setup and it's a medium, although it is an Abu rod which runs closer to a medium-heavy than most. I love using it for weightless stick baits, 3/8oz< spinnerbaits, 1/4oz< jigs, shallow diving cranks, 1/4oz T rigs, buzzbaits, buzz frogs, the list goes on and on.

 

I know most people say that a MH/F rod is the most versatile, but there's a lot of stuff you can do with a M/F. Only thing I won't/don't like doing with it is 1/2oz+ jigs and spinnerbaits, and punching. I barely do that stuff so it's not a big issue. 

A medium can do a little bit of everything.

Depends on lure rating, like someone stated not all medium power are created equal.  Medium is a versatile stick, just like a medium heavy is...just think of them as the younger brother who can only use lighter weights.