It would be fantastic if you could save a set of filters as a "view" that you can quickly click on to sort your library in a particular way, without having to set each individual filter criteria each time.

For instance, say I have a view I want to call "Unplayed Playstation Games". This filter might consist of the PS3, PS4 OR PSN platforms and the NOT SET play status. It would be great to save this view so that next time I want to view with these filters, I can just click that saved view.

a 5 star rating score can given to any game I have played

It would be phenomenal to have something off to the side with links to stores like Amazon, Best Buy, eBay, etc. much the same way Blu-Ray.com does on their individual title pages.

Maybe even with a list of stores showing current prices,

The ability to see more under each category. I'd personally like to see a lot more than just the 12 in each category.

And then perhaps a recommendation system, that will give a list of recommended games based on things like favorite games. Maybe even let us choose our favorite genres, and it will recommend games based on that.

When you currently click on Wishlist, its changes the game status to "wish to play", but I use that as more of a backlog type deal, and so it's kind of confusing to see games I don't even own in my backlog, so maybe a seperate Wishlist/Unowned status?

I want to see an upcoming schedule of games within the next few months so I know what's on the horizon and can follow games I'm interested in

I want to be able to track DLC for a game, like Destiny. DLC has release dates so I should be able to get notified about that.

Going through some of my own Steam library, there were many games picked up through bundles or sales that I, (being honest with myself) will never play. Either they don't look interesting, or I know they're terrible games. Can we have an option for "Won't Play", or "Regret" to differentiate them from "Undecided"?

I'd love to see an expansion to the stats page where we could see how many new games we added per year vs. how many games we beat per year, and in what order.

If I played a game's demo, it doesn't mean I own that game, but they'll come when I sync my account anyway. Also, some games release demos before the full game (i.e. Resident Evil 7), and I would like to see the release date for both. I would also like to know if the games on my wishlist have demos available, so I can try before I buy.

Wishlist and Want to Play could be combined into a single category.
Beaten, Completed and Mastered could be combined into a single category.
I feel that active, paused and abandoned could adopt a green, yellow, red light option, and not be a list on the sidebar.
I think the New List option will take care of the needs of individual gamers.

Currently we can add notes for the games, but they are only visible in summary page. It will be nice to see the notes in the game page as well...

I have many games I don't own yet but am planning to get at some point. It would be nice to set different priorities for games you don't own yet.

I have a lot of games, and every once in while I like to trade or sell some of the titles I haven't played in a while. Often this can mean me selling off an entire console and all the games that I have for it. I would be useful if you could integrate with ebay or some other source to come up with an estimated asking price for each game so I could easily see what a fair value for my games / groups of games is.

Would be nice if you could specify which consoles you own so that When you search for a new game, it would show you games for your consoles first. This would greatly improve relevance of top search results. Bonus points for "console wish list", "own but don't play any more" and "used to own" to display after your current consoles but before other consoles.

There are some free-to-play games in my list that I've never (that I recall) played (AdVenture Capitalist, Double Action: Boogaloo). I think hey shouldn't show up in my list until I play them. Team Fortress 2, on the other hand, I have played, so it should be in the list, but it isn't. :-)

In general, I could see being able to exclude games from the list could be useful, too.

It will be nice to have a context menu to change a single game properties. This will save lots of extra clicking :).

Very cool feature is set own covers for games. Because I would like set cover my edition, for example my language version. I am an esthete and i would have to cover the same dimensions and boxes for each platform. :)