We've been living aboard for over three years now and have gotten to know our 420 pretty well. For a while we thought we might sell her and find a boat that would suit us better but we discovered there is no such boat. At least not in our price range. Instead we decided to improve what we have and make her work better for us.
A major sticking point for Cheri has been the galley. There are some places in the cabinets that are next to impossible to get at. She felt frustrated with the size of the sink and the layout of some of the cabinets. Since Cheri enjoys cooking we decided it made sense for us to make some design changes and try to improve the galley.

Beneath the oven was a cubby hole that was supposed to be used for pots and pans, I guess. In reality, anything that got stuck in there was lost unless it was right up front. You had to get on your hands and knees to find anything. We replaced this with a drawer. The back of the drawer matches the shape of the hull to take advantage of the space and to prevent things from shooting out the back a lip was added. The front face of the drawer is an exact match for others in the galley.
were replaced. The old ones had a useless shelf along the top that was really too narrow to use for anything but napkins. The new cabinets extend to the overhead and have a shelf providing twice the storage space. We also added a cabinet behind the stove that stores our spices and oils. The counter insert for the stove fits into a slot below this. To make this insert level with the rest of the countertop Hinckley lowered the oven 1" and pulled it out 2".
The cabinet to the right of the stove had a shelf that didn't extend all the way to the back and every time we heeled over stuff would fall through the gap. We had the shelf extended all the way back. Originally we were going to have two drawers put in here to match the one on top but went with fixing the shelf to save some money. All the cabinets have faux louvered doors to match the look of the other cabinets on the boat. We had to fake the louvers because the sliding doors are only 1/4" thick. The cabinet maker mocked one door up for us and we liked it so much we had everything done that way. This is really beautiful craftsmanship. He even did a recess cut along each edge to throw a shadow to make it look more like actual louvers. For the finger-pulls he inserted ivory from some old piano keys he had been saving.
Another area we improved was the sink. Originally it was two bar sinks and both of them were pretty much useless. We put in a single sink that was slightly larger and required the new faucet to be located off to the left instead of the usual location behind the sink. It's nice and deep and has plenty of space for large dishes and pots. We also extended the counter to the left of the sink by 5" so it has a slight overhang. This added a nice area for placing "stuff" when you're doing the dishes. We added fiddles in strategic areas around the sink, stove and the counter to the right of the stove. We figured these would be the places most likely to be used for placing things while underway and needed that extra protection. We also used the piece of Corian that was cut out for the sink as an insert. We had it cut down to 2/3 the size of the sink so you can work on it and shove cuttings into the sink. The insert had to be trimmed with teak to fit on the ledge of the sink without falling through.
Update 12-11-14:
The two issues I mentioned a few months ago, the faucet location and the fridge and freezer lids are no longer issues. Cheri decided she didn't want to change the faucet. I'm OK with that.
We found a cure for the lids. We originally left the struts off the lids because they got in the way and without them the lids could open wider for better access. The only problem here is that there's a cabinet directly behind the lids which prevents them from laying back far enough to stay open on their own. I've been pondering this in my subconscious for a while now. Tell me something, do you do this......whenever I go into a hardware store for something I could spend an extra hour wandering around looking for inspiration for other unfinished projects. We have a great locally owned hardware store in our area and I was in there for wood glue or sand paper or something and came across these nice brass slide latches that would work great for our freezer lids. When I got home I cut up some scrap pieces of wood for a base to get the latches to the right height and installed them so they just catch the edge of the lid. This works great! You simply lean the lids back against the cabinet and slide the latch in from the side to hold it in place. Of course, I still need to stain the bases to match the cabinet so this is another unfinished project right now. That means I'll hafta go back to that hardware store again. Maybe I'll find another project solution while I'm in there. Hardware stores are like toy stores for growed ups.