I'll be updating this over the course of time, But here are some suggestions.
Forum Post & Post bit
Making the postbit look a bit nicer, Atm its just the basic post count and rep merged together, add a bit of style to them + thread count.
Post bit background - Now this gives a bit of design to the forums.
Post ranks - Bronze, Iron, Steel, Black, Mithril, Addy, Dragon, Etc based off the amount of threads/post - Banner and or name color.
Believe this was new, But an option to upvote/downvote a server + Online time would be a nice addition, also to go above and beyond a template for those to use.
A Thanks system - I know we have the rep system but instead of rep boosting we can simply thank someone for a useful post.
Custom images for this: http://prntscr.com/nlc5tb
Who's viewing your thread - So we can see who is active on our post.
Make it show all sub categories instead of just a limited number: http://prntscr.com/nlc6rx