We did something like this. The picture above is from etsy. We customized it with our countries and favorite colors. Most of our guests signed it and we love it. For us it's a beautiful memory of our wedding and a picture of our story (we're from different countries). It Gangs in out appartement now. We had about 80 guests.
Everyone signed my guest book at my first wedding! We did a canvas with our names on it. I love signing guest books at weddings! Definitely don’t skip it 🙂. You could do a cute wood panel with your names for people to sign or something you could hang in your house or apartment to remember the day.
We are having a ceramic serving platter as our guest book. A family friend of mine did this for their wedding and they use it for holidays. I love our platter so much, the wedding is in 3 days and I’m still in the fence about having people sign it.
We made a photo book full of pictures of us over the 8 years we've been together. Each page had only one or two pictures with lots of space all around. So each guest signed their names and left us a little message or well wish. I really like it and even now, over a year later, it's on our coffee table and we still flip through it or someone else will flip through it when they come over to our house. I could see why you wouldn't want a typical guest book where the people just sign their name and that's it, but a fun creative one can be a good memento from the wedding. You won't necessarily know exactly who all is there just based on your final headcount and pictures. It's a busy hectic day and it's easy to miss people or forget people.