Can't really help without a bit more insight, as Emmeline points out. Give us a little more background and we'll see what we can suggest! Remember that any choices you make wrt changing kitchen cupboard doors will be limited by the style/colour of any carcasses you want to reuse.

I think the only way to get more would be to ask the kitchen company very nicely if they’d give you some... you shouldn’t find shelves too forwards tho, regardless of the weight. Mine has supports right near the front and right at the back, so to have enough weight to tip it’s essentially off the shelf anyway! So maybe go back to them and say it’s a problem and see what they say!

I would paint them! If you have a look at our Kitchen Refurbishment project on our page, it's exactly what we did. We replaced the hinges and knobs on an old pine kitchen with polished chrome and painted the cabinets. The client cried when she saw it finished, she was so pleased, and her friends and family thought she'd had a new kitchen!

Tricky one - colour is incredibly fickle, especially when you compare different surface finishes (the PVC compared to chalky F&B) and in the unique light of a particular room, with all the other colours & surfaces in play. Personally I like the colour you now have, and might wait until I had painted walls - just doing this may get the space feeling closer to the colourway you envisioned. Different tiles to the reds & terracottas would also transform the look and allow the green to shine through. If you do take up the (very generous & honourable) offer of the sprayer, then be sure that the revised colour is going to tick your boxes. As others have said, a good few 5 star reviews around the web would be in order for a company offering good customer service like that! Oh, and the brass handles look great - you might also consider the American brass & American copper finishes from Croft & Assinder!!