Wish I spent more on:
+House, bought in 2008 so was worried about the downturn and losing money on a more expensive property, but would've had a nicer house (4 bed detached instead of 3 bed terraced) and made more on appreciation over longer term
+Sofa, we have a fabric sofa and a leather armchair of the same type, the leather is much easier to clean
+Blinds, getting fitted blinds seemed really expensive so I bought our own made to measure and it doesn't really fit properly, keeps falling down and means there are too many holes where it was fitted now to put back up properly
+Dining chairs, ours seemed pretty decent value but the springs are squeaky and not the most comfortable to sit on after a while, you can feel some wood. Then again, very happy with the table they came with.
+Our old grill that didn't have dishwasherable plates, much easier with the replacement
+Flooring in bathrooms and hallway, should've gone with something more durable
+PC, I used to spend a lot of time gaming etc but have always looked for value rather than buying better stuff. I don't get much time for it these days and to some extent wish I'd splashed out while I had the time to enjoy my money.
+Mattress for our spare bedroom, it doesn't get used much (perhaps 10 nights a year) but slightly embarrassing as it isn't really firm enough [no, that isn't a euphemism!]. Then again I guess if you compare cost per nights used a year it is way more expensive than our master mattress.
Wish I spent less on:
-Baby/toddler stuff, very little usage compared to the total outlay of many thousands
-Sofa, in hindsight a big corner sofa with recliners takes up loads of space making our (moderately large) living room feel smaller, and things fall through the cracks and get stuck underneath
-Gadgets in general, e.g. blender and coffee machine sit largely redundant taking up space in the kitchen. When I say spend less, I mean don't buy at all.