DHSF you strike me as someone who is comfortable, so I would go all out on the heating (good systems sell houses), if you own the place of course (sure you do).
Plus, if it is old I'd get some cast iron radiators (well I'd say largely whatever the age, maybe not some new places, but very cool for warehouse looks, victorian/georgian and older, even if there is a modern finish), we have an older cottage with an inglenook/back boiler and no gas in the village, so we have a couple of these which run off electricity (but that costs ALOT more), still water filled but with an element, would rather have gas as long as the boiler is quite a distance from living/sleeping spaces.
Here's a builder, so you can upload a picture of your wall and impose a radiator onto it. Should you be interested.
http://www.castrads.com/builder/
I've really tried to find 'wall art' and stuff but can never find things that are just right (very irritating), we going to get rid of all ours downstairs and get some more, plus new curtains, new carpet for the loft conversion and stairs to it... expensive next few months.
I'm also going to paint the entire house with organic, zero VOCs, paint (well the parts of it which are not already covered). I look forward to doing most of it, but hate the planning and deciding (my wife instantly becomes the spawn of goebbles when it comes to paint colour choices and soft furnishings!) is something of a mare.
Chich - considering your like of all things Japanese, I would suggest you try some decent quality Mandarin Essential Oil (we have it, in fads, in our bedroom as it is a relaxing fragrance, I pour a little oil in and burn a tea light when I go up for bed, by the time I'm washed and ready for bed the room smells lovely, sometimes blow out the candle, sometimes let it burn, you know that's how I roll!), plus a tea light/oil burner is also quite oriental if not directly Japanese. I use Lemon for the lounge/kitchen, fresher, more lively... You can get larger amounts on Ebay quite cheap (ie for about £20-25 you can get 250ml of Organic Mandarin Oil, if I recall, yet it would be about £5 for 5-10ml in a Holland&Barrett). No chemicals in that brick, or very few compared to most home scents, why people would pay to be slowly poisoned is beyond me, but I guess people just don't want to reflect on their ways.
Anyway, Free Leeds!