There is never only one right design solution, but there are many design practices that are generally frowned upon in the design industry that will make any design look unprofessional. Read more about them below
1. Poorly executed gradients
It’s a common mistake to overuse gradients when learning how to use vector graphic programs, but it’s important to know that extremely eye catching gradients are less popular due to the influence of flat design, If you do use gradients, make sure they are well-executed and relevant to your design.
Effects in Microsoft Word like dramatic drop shadows and bevel and emboss were very popular in the 90’s. Today they look amateurish and outdated.
Read more about how branding aesthetics have changed here.
Google’s 2015 and 1998 logo
3. Raster images in logos
Raster images like photographs should never be used in logos. Logos need to created with vectors so they can be scaled to the size of a billboard or flexible across different mediums. It’s fine if your design is inspired by your own photo, but it’s not considered professional to use it as is in your logo.
Read more about when to use vector or raster images here.