Another great, thought-provoking thread, Nancy!
I'd say I'm in the opposite camp of 60% old and 30% new. What happened to the other 10%? Well, it deserves its own category of superannuated! Yesterday, around the house, I wore a skirt I've had since I was 10 --- don't be alarmed, it's a polyester (blame Angie!) self-pleat in black and below the knee, as I was almost the same size in the hip, the same height then (the apple belly came later, but it's an elasticated waist). I still have my mother's winter wool coat, older than I am! Sarees that are decades old... So yeah, things like that need their own category, right?
I think my biggest buying 'spree', though on a tight budget, was around 2003, when I moved cities, went through a couple of new jobs in different industries, got married... so lots of change, and a bit of extra income beyond what I was used to. There was some smaller but steadier buying in 2004-05, demanded by a job in a workplace that wasn't the right cultural fit for me, perhaps, and I kept trying to fit in with clothes! Taking the plunge to quit and go freelance freed slowed down the buying for a while, but I did get a few relatively pricier pieces too, as I started to rebel against what I now acknowledge *wasn't* my style --- but there were many unsuccessful experiments too! Then, with another move a couple of years ago requiring a drastic reallocation of budgets, I'd been in SYC the last couple of years like Tanya --- meaning I am only just starting to get new things again in a careful SYB mode.
And I'm also sentimental about some things. They're in good repair, maybe a little outdated, but I'll still pull them out every so often when I'm feeling nostalgic and treat them as 'vintage-ish'. Like the kameez I posted about a couple of months ago, sewn by my dad when I was a teenager!