Would be nice if ALL of the hats carried some kind of bonus. Perhaps some items should carry both XP and coin bonuses together, at lower percentages of course... I really like the Drill Sergeant hat, but I don't like it that there is no bonus to go with it...

ver 0.152.06

All hats, except for the really early ones, SHOULD have a bonus! You sir, have just found a bug!! :) Have informed design to get onto it pronto. Thanks Cassidy.

Is the drill instructor hat considered one of the really early ones?

No it's not. We're fixing it in the next build. :)

Super Shweet

No worries :)

Why does roman helmet 2 gives only 30% coins bonus, if normal roman's helm gives 150% XP? Comparing to diver set (150%; 40%) and helmets price of 50 cash, its kinda ripoff :p

This sounds like a bug and a half! Thanks for pointing it out Towelie!

Well, then most of premium hats are bugged :P
Russian Fur - Hard Hat: 50%,20% - 50%,15%
Cop & Baseball Hat & Dark Wizard - Cheese Head: 100%,20% - 100%,30% and knight is similar with 25% coins

Maybe they just need to be tweaked a bit, also would be nice if all hats would have some bonuses, depending on their prices :)

Cheers