I'm in the processing of choosing cabinet doors as well. As others have posted there's a difference between a Shaker door and a flat panel which has an inner profile milled into the inner and/or outer edge of the of the rails (horizontal portions of the frame) and stiles (vertical portions of the frame) of the door. The minute there is a deviation from a straight blunt edge it's not longer Shaker door. Flat panel doors can also have a separate piece of molding applied instead of having a milled profile, or both.
Shaker - void of all detail and ornamentation.
Flat panel door with applied molding. Not Shaker.
For me, the Shaker looks cheap and utilitarian because that's exactly what is and what it was designed for.
When choosing a door, pay close attention to the width of the rails and stiles relative to the width and height of your doors. The taller or wider doors with narrow rails and stiles, look odd and out of proportion to me. Partly because they are. Manufacturers can and do save money by slimming down the width. You'll find as you move up in price point for doors, that the rails and stiles get wider. In my opinion a nice sweet spot is between 2.75" and 3". Too wide, and the door scale starts to look off to me. Notice what a difference the width of the rails and stiles can have on a door. The first door has a width of 2.25" and the second a width of 2.75". In these pictures, both doors are roughly 15" wide. Imagine these doors at 18" or 21". In my opinion, the proportions of the second door scales better to larger more substantial doors.
In my opinion, it's not the Shaker style (square, sharp-edged rails and stiles) it is the flat panel door in general, with or with inner and outer edge profiling.
The majority these kitchens I see on here with a true Shaker full overlay door and five piece drawers look to me like they have framed white boards (the kind you write on) for cabinet doors.
Raised panel doors are not out style. They are as classic as a true Shaker door. They are more formal and traditional in appearance. The question to answer is what is architecturally appropriate for your house. I have a 1935 Dutch Colonial. Here are some of the door styles found in my house that are original:
An authentic Shaker door is not architecturally appropriate for my style of house. A flat panel with a beaded or ogee profile would be right at home in my kitchen. So would a raised panel door, like this one:
Shaker just wouldn't look right.
Get what fits your home best and what you like.
Q