When a man's suit fits, when the construction is beautiful, when the sewing and fabrics are there... in the end, you'll look the best in it.
The thing about the basics is they don't really change - it's the details and the proportions that change. The shirt may be cut slimmer or looser, the suit might be darker or lighter, the sneakers might not have laces, but you're still talking about shirts and suits and sneakers.
A black suit can be classic and timeless and certainly for most occasions. But remember, it's not so much the color of suit as it is about the fit, cut, style, and, of course, attitude you have when wearing it.