IMO too much! However, to me photos are your friend -- they're better than your eye. When you do some changes, take another picture and compare . . . and keep doing that until you like the way it looks.

This is one reason I dislike bookshelf decor they are always too much clutter for me. I love books and have bookshelves full of books not decor. I think if you like it you should enjoy it and not ask for opinions.

Thank you for the advice, the shelves are adjustable, (although a pain to move)

is ther any rule to follow, like larger on th bottom then smaller as you go up?

Emily Henderson has done a few posts on her blog about styling shelves. Here’s one:

https://stylebyemilyhenderson.com/blog/modern-organic-entry-shelf-styling-tips

The colors are very soothing and go very well together. My eye does not catch a lot of variation in height or size of objects, so it all starts looking the same. I completely agree with Lefty47.

Have the same problem so watching with interest even though notifications don’t work for me! But will try to watch what you end up with. :). By the way, beautiful room.

I think your shelves are a bit darker shade on the back? I like that. I would look at the shelves that have 3 items, and maybe cut back to the 2 favs. in some of them... In the shelf that has 5 items, I would cut back to the 3 largest items, near the base of the shelving .... Another suggestion might be that in a rhythm or visual pleasing pace, a few of the alcoves should be all books of similar size or hue/shade. That will calm down the books that appear stacked and racked in many places, and may really be all you need to do in the end?? Just a thought. Also, I like nice magazines, don't be afraid to add a collection of them, say 12 mos. worth, which may be 4 or 6 or 10 or 12 issues, on a couple of the shelves. The bindings are thinner and may balance one of your precious memorabilia quite nicely in height, for instance. I wish I had your shelf wall. My dream is to have a library(for all my saved magazines and books) perhaps on a wall in a dining room some day..Also, having the shelves be a light color is absolutely one of the best things one can do, since it does not have glass pane doors on it...and you probably can guess why. Oh, another thing that can be quite interesting, if you have a foggy mirror or old mirror, or even a new one, that would cover the back wall of one, two or three areas, it can create light and interest in reflecting a special display in front of it.. Again, really nice wall of shelving.

Yes the are painted the same color as the walls which is like a wheat.

I would try just art above the fireplace or just the metal tray.
Have at least 1/3 empty space on the shelves. Any small frames should be low enough to see them when seated.
If I’m being really picky, the lamp receptacle could be covered by your leaning art. Straighten books and trays, I find the items placed on an angle too contrived. Move one of the two acorn shapes from the top shelf to another level. If you have collections, they may look best together on one shelf. Candles, place them in a lovely storage box, if you don’t burn candles on the shelves, remove them from the holders or place them on a table where you would burn them. Use odd numbers of items per shelf. I do like the contrast of your wall paint at the back of the shelves.
You might want to add more photos of the full wall. It’s all lovely, you just need to tweek some things, take photos and reassess.

Love the combo of brass tray and stone wall. Beautiful. I would remove a lot of things - 1/3 of the objects in the shelves. This looks a bit too fancifully placed and staged to me.

Do you ever read those books, do they have personal meaning or are they just to look pretty?

Lamp looks squashed and impractical on that shelf.

What of these items do you really love, what is there because you love it at the time you bought it, what is just decor but doesn't really do much for you?

If you can part with 1/3 of those belongings, I would. Then start fresh with how you want these items to live in each shelf.

HI -- A little plan that might work for you is --- heavy books or items on the bottom then one big thing on the top and going down do two items then three then one and repeat . Sometimes you can do a left to right as you go down too . Some empty or one item shelves gives the eye a resting place . But vary the sizes and heights of objects and have some shiny and some glassy and color and mix in a few flats like photos or pictures or paintings and round plates /platters . All depends on how big the shelves are and if you like more or less . Less is always good . Display collections like if you have a Blue and White vase collection. Occasionally add in a live plant or flowers . Most people do too much . Like my family member that had hundreds of Hummels that never moved around for 30 years . I was so tired of seeing them . You do not need to display all your things at one time . If some things are stored away then you can change it up when you need to and seasonally . Never leave it forever the same .

I don't think you can go wrong with lefty47's suggestions.