I note with some sense of shame I started a similar thread 5 months ago. and my shelves are still not finished ( well actually the shelves are, the plastering is not ) they ended up being extremely strong, cheap and if I say so myself stylish. To answer the question I asked in the thread I ended up spacing the shelves deeper at the bottom and and getting progressively smaller towards the top.
I played around with the spacing a lot when they were evenly spaced they always looked as if they were about to fall on you. And because of this I was able to accommodate various sizes (obv.) that I wanted stored ( LP’s Mags etc ). on the left of the alcoves I have maintained the same spacing as on the right but missed a one out to incorporate a tv which looks a lot better than I feared it would.
I have also added an LED strip light at the top. Someone gave me it and i was skeptical at first but it is a good addition. It was of course an easy option I was plastering anyway.
shamefuly long time ago unfinished shelf thread