The setups I use the most are casting setups,with a baitcaster and casting rod. The only time really ever use a spinning setup,is when I dropshot or I'm wanting to get distance on a light lure without the fear of a birdsnest. I also use a spinning setup for light jerkbaits.

Have a 1 piece MH 6'3" spinning rod. What application would this be best for?

I use a 6'6" MH/F spinning rod for senkos. I always have one T rigged weightless ready to go. It has become my senko rod cause its just about the only thing i throw on it.

Drop shot, wacky, shaky rigs, would all be fine.

Mike

Skipping baits under docks or other overhead cover.

How would a 6'3" MH spinning rod be for larger spoons,like a Strike King Sexy Spoon,or a 3/4 to 1oz Kastmaster?

Only time I would use a MH rod is if the vegetation is thick, otherwise I'd opt for a lighter set up. That being said not all mh rods are the same, some may fish lighter. I would personally use a 6'3 mh rod for larger species, 3/4 oz-1oz spoons should be perfect for that rod.

The MH rod would be fine for heavier spoons and/or Senko type fishing. For jerkbaits, tubes and some of the lighter cranks, I'd opt for a 7' medium action spinning rod. This rod could do double duty as a DS rod, but I prefer a light to medium light action if you DS frequently. More fun!