It just occurred to me that there wasn't really a list of what was available for custom groups... so here have a list!
Font - Any of the fonts available on Google Fonts
Gradient - Gradient effect on text (so going from red to dark red, blue to light blue etc)
Gradient Direction - Up, Down, Left, Right or Circular (The direction that gradient takes effect on)
Images/Icons - Small images before or after usernames
Sparkles - Animated GIFs that display behind/in front of the username/group.
Glow - Text outline that glows
Drop Shadow - Add a drop shadow to your text (not compatible with the glow)
Font Styling - Bold/Italics/Underline etc
Font Direction - Flipped horizontally/vertically etc
If it's not on this list doesn't mean it isn't possible! Feel free to add any other requests once you receive a PM from a member of staff to redeem your custom member group and if it's possible we'll try our best to get it done for you.
Once you purchase the custom member group item from the shop a member of staff will be in contact with you shortly.