Typically they will use:
- Black on white
- Contrasting bright colours
- Very simplistic design
- Big text
- Commonly a black background
All of these things are obviously used to catch the user's attention and the simplistic design means that the logo doesn't need to be on screen for too long for it to be embedded in the viewer's memory. The black background can fit almost any colour on it so it is commonly used, it also means that it can be used at the start of any genre as it won't ruin tension or laughter.
This was the outcome of our brainstorm:

