Just the right blend of drama and fun, and no seperate montages for different emotions like 'happy' 'fiery', etc. Oh and it should be done week by week, instead of jumping from like week 1 to week 4 then randomly showing something from week 3 lmao. The song should be a relatively sad song too, one where it enables you to reflect on the series.
If you can do any of that then you've done a far better job than Channel 5