Not silly at all! You deserve nice things and you will enjoy using them because you won't have just bought them on a whim, or because they were a bargain etc.
I think the 'not buying as much' is going to be the hardest part of this whole process for me. I do feel differently already, but still a long way to go. This Christmas will be the real test! I've never gone hugely overboard but could certainly reduce further without feeling like the DCs are missing out. They don't see any commercials as we don't watch tv, so that certainly helps. So far there's been none of the "must have toy" issue (though eldest is only 6 so obviously peer pressure will get worse in the future... Sigh)
It's lovely to see how much nicer the DCs are playing now there is a bit more space. We have done painting and playdoh for the first time in months. I've also gone through all the accessories and ditched loads. I was sucked into buying all the weird and very specific little extras like pattern rollers, squeezy garlic-press shaped things etc. They take so much imagination out of the process as it does everything for you. And I KNEW that it was going against my principles when I bought them. Anyway, now they just have shaped cutters like animals and letters, a few normal tools, a small rolling pin each, 6 paints, paint pots and normal brushes in different sizes. That is plenty!
I no longer care about wasted money. Because it is just as much of a waste to keep the stuff but get no use from them, isn't it? I can't even be arsed to try and recoup any of it (eBay etc) TBH, I just want it out. Duplo is pretty much the only exception to this as I know that sells very well.