Four button suits are so sharp looking and regal. To me, when a man wears this style of suiting, he is going places. The style is refined and so perfect looking, as everything appears to be in its rightful place. Part of the reason, a 4-button suit looks so good is that the length of the coat or jacket is somewhat longer than other suit jackets and blazers. In fact, reaching close to the knees in some styles. Indeed, you cannot go wrong with this styling for a formal evening out, a wedding, or even going to work if you are a entertainer.
One thing that I appreciate about four button suits that you do not see with other suits is the fact that there is a colorful selection in this styling. Often, you see orange and brown pin stripes, reds, yellows, and even pinks or lavenders. You would never see a one button suit jacket for men in pink. 
But because of the styling of the 4-button suit, the bold colors pop and are very appealing on the men who wear them. This suit is also exceptional with a matching color hat. Where the other suit jackets look too casual to wear with a hat, this styling is perfect. Other accessories that complement this style are matching vests, hankies in the breast pockets, and plenty of gold jewelry.
Generally, the pants that match the four button suit jackets are just as fancy with double pleating, wide legs, and pant cuffs. Often the suits are made with superior fabrics such as wool, silk and crepe. Even the cheapest priced 4-button suit sets are made with higher end materials from Italy. The insides of the pants and jackets are usually impeccably finished or tailored with split waistbands and collars, hand finished accents, and pockets to carry anything from eyeglasses to pens and keys.
For guys that need a proper suit for work, something more fashion forward than the classic two button suit, the 4-button suit styling is ideal. Just be sure to choose some of the more traditional colors like dark blue, brown, charcoal or gray. The matching vest might be a little much for work, but if you plan on using the suit jacket more as an overcoat, wearing the vest finishes off the look when you remove your suit coat. And the vests can be quite stylish on their own. You rarely see the plain vests like with the two button suits. Matching vests to four button suits usually have alternate designs such as fancier lapels and kitty corner button-ups.
Of course, if you thought guys get all in an uproar over how to button a one, two or three button suit, imagine the drama with a four button suit. Some say that you are not supposed to button the bottom one, but it does look good in a formal setting, in my opinion. Also, some say if the coat is particularly long, and you button it all the way, it looks more like an overcoat or trench coat instead of a suit jacket. And, although you are not supposed to wear a three button suit with only the top buttoned, the 4-button suit actually looks quite sharp with the top button closed, showing the fancy vest, colorful tie, and dress shirt underneath.