Noo, corn is extremely bad for bunnies, starchy food like corn, potato's should NOT be given to a Bunny. I'm pretty sure grain is bad too.
I buy the oxbow brand (no fruity bits) pellets for my bunny. A rabbit's diet should consist of most hay (timothy hay is good)
I'm not sure what you mean by 'bored of just green pellets'. But rabbit's should get the "just green pellets" the other fruity bits are really bad for your bunny.
Do you mean the tops of carrots? Yes those can be given to your bunny, the actual carrot should be sliced up and given as a TREAT.
the bunny will of course pick out the colorful bits cause that's what taste the best, but really, they should be eating the HEALTHY pellets.
My bunny is the same with ravenousDragon's, Andy loves his oxbow pellets.