My selection of boards excels in quantity rather than quality. Horrible phone pic but you get the point...
From the bottom (sizes in cm):
-60x40 endgrain beechwood (brand Butler, surprisingly affordable and great stuff)
-45x35 endgrain beechwood (same)
-45x36 bamboo from ikea (was my meat carving board... it stands up to neglect and abuse extremely well, but also dulls the knives so I wouldn't recommend it)
-2 cheap 40x30 beechwood (that were like 5 bucks a piece), some warpage on one of them but doesn't really matter; these are what I often use for carving smaller stuff or pizza, or when you just need/want another board
-2 cheap ikea 35x25 beechwood (similar story)
-35x25-ish endgrain beechwood that has become my bread board
-1/1 GN (I think thats about 53x32,5 plastic board (only used for raw meat... I don't love these but they are very easy to sanitize)
-2 1/2 GN (32,5x26,5) plastic boards. Similar story; these actually go in the dishwasher. But especially carbon knives suffer in edge retention cutting on these.
-Small assorted boards mostly used for cheese and snacks (1 is beech, 2 acacia, god knows what the last one is).
The whole stack is about 32 cm.
I'm mostly happy with what I have. The only thing I see myself 'upgrading' in the future is
an even bigger endgrain board - or basically just make an endgrain countertop that I cut on. But the current size is large enough that the desire to upgrade isn't really pressing, and I think going even larger would make maintenance downright annoying. Whatever I do I'd still stick with beechwood. The stuff is affordable and has worked great for me...
I really don't like the plastic boards and I can see myself replacing them at some point... question is really with what. Bamboo is just as unkind to the knife edges, hasegawa is expensive (and might also add microplastics to your food), and most woods don't take kindly to being dunked into boiling water and that sort of thing. I also have to admit I do like the convenience of having something I can dunk in the dishwasher for when I'm just cutting up a slice of guanciale or coppa.