Make an awesome robot suit. Don't make a less-than-awesome robot suit. I feel that's important.

Way back, I made a suit out of cardboard. The head having the most detail, while
the body was a bit much to be desired. A custom 'Blaster' gun as well.
I got mixed reactions. Lots of cars honking as I walked down the road in daylight
to work with it on. I got some personal complements here and there.
Then I said, what the heck, maybe Ill enter a costume contest. Went to a local
club... and low and behold, there was a guy dressed up in a full Borg suit!
The suit was hand made, had blinking lights, spinning motor driven claws,
and looked exactly like it came straight from a movie set.
When I stumbled out there, (my leg joint were falling apart) A got a
bunch of people laughing and one guy yelled "Cardboard Man!".
>.<
Anyways, the Borg won. And heck, with probably hundreds of hours and loads
of cash spent, he deserved it.
Bots are pretty tough to assemble, while still having good mobility
and durability.
Was fun though, .. and best of luck on it.