Now as anyone at Anderson & Sheppard will tell you I am a big advocate of three piece suits. For me having a waistcoat adds an extra level of style and in some ways can change the entire look of the suit; whilst also allowing a smart appearance even when not wearing a jacket.
Whilst there are not as many style options compared to that of a jacket, the main visual aspect is the lapel styling. Personally I love a step collar on my waistcoats, however there is the option of going for a plain front on the vest with just the pocket shape being the visual part, this allows the waistcoat to blend in seamlessly with the jacket that’s being worn.
A shawl collar which was once reserved mainly for dinner-wear is now becoming an ever popular style to have. In my opinion it is a cleaner and more stylish option compared to typical double breasted style of vest, but once again this all comes down to individual preference.
A final point is that having a contrasting waistcoat in an interesting route to go down, for example having a grey suit with a blue stripe/over check and then having a waistcoat made in the same colour blue as the stripe or check completely changes the look of the suit as a whole. Of course this wouldn’t be something done for a business suit but for a more casual 3 piece, it can give the customer more options and can act as a bold talking point.