What modelling tests do you recommend to not be a cookie cutter?

I know there are some well known providers/sources (WSO is in the mix) and I am not going to mention the closest competitors due to respect for this page (but   you all know the big companies). 

I am just wondering: lots of these tests seem suprisingly cookie-cutter like. I've aced through some of the PFs for instance and it is literally always the same with very little quirks. I've almost never done a LBO test where there was e.g., more complicated structures on the equity side (sweet equities, etc.) or some more complex distribution waterfalls on the return side. 

I'm just afraid that I will see this for ths first time at some LC funds I will be interviewing. Are there any must-do sources on the web that I should look at?