I have tried many different PCB softwares, I find Kicad ok, but it has some pitfalls ( I can't remember what happened, but the PCB I got back from the fab had mistakes, and they were not showing up in Kicad).
I have settled on Altium (no a quite legal copy though, see pirate bay, but it is only for hobby stuff) after using the free version of altium called http://circuitmaker.com/.
I would recommend you download the circuitmaker version and play around with it, you can do anything you can in Kicad, but ones you get serious you can transition easily into Altium.
Save often with circuitmaker, because I have heard that once it fails (and it still has some bugs) you can loose your days work.
One of the best features of Altium I like is the 3D viewer, it can really help you with PCB design, think of mechanical issues like the size of components and how they interfere with other components.
Hi
Ok so in the context of the OP who is looking for something on his resume:
Big Boss: I see you have experience with Altium?
Poor victim: Yes, I have a copy and have done a lot of work with it.
Big Boss: Have you ever done this this and this?
Poor victim: Yes, indeed I have.
Big Boss: Great, that's what we use if for.
Big Boss: One last question .. where did you get your copy of the software?
Poor victim: I stole a a copy because I figured I would not get caught.
Big Boss: End of interview, please wait here while we call the software police.
Bottom line, no matter what benefit you *might* get from having experience with this vs that package .. it's nothing compared to the automatic disqualification you get for stealing it. Worse yet, the kind of place that *won't* disqualify you is *not* the kind of place you would ever want to work (assuming you care about paychecks bouncing and that sort of stuff ...).
Bob