Shiny, we're nearly birthday buddies! (Mine is today).
After reading your more detailed explanation, it sounds like you are perhaps a good candidate for veneers. If several teeth are damaged, plus you don't love the shape of them, and you already have a crown anyway, it might be worth it. The crown will not, of course, change colour over time, but your natural teeth will, and then they won't match. Also the bonding on the damaged teeth won't match, and it tends to need to be re-done periodically because it falls out. Veneers will take care of that problem. Your teeth will match the crowned tooth perfectly, and they will all be white and nicely-shaped. (Also bear in mind that the gum issue is really NOT an issue for most people; only for me, because I have such a gummy smile and an annoyingly nitpicky eye).
As far as them needing to be re-done? The dentist will tell you the average lifespan of a front crown or veneer is 10 to 15 years. It's an average. Some can last far longer than that, some far less. Of my six front crowns, two needed replacing within the first five years (one because it was defective from the beginning; the other because I cracked it while eating a sandwich at the beach, and the darned thing eventually fell right off). The other four are going strong and still look great, ten years on.
One of the biggest reasons front crowns/veneers need replacing is that as you get older, your gums recede, and will show the edge of the veneer (which originally would have been hidden below the gumline). Functionally the veneers could be fine, but it'll look bad, so people replace them. And it's hard to predict how fast the gums will recede. Taking care of your gum health is thought to help.
Hope that helps! Good luck with it all.