I've actually got a list I've already made up just for such an occasion
Expendables 3 (botched HDR),
IMAX Journey Into Space (meh movie),
ID4 (bad artefacting in SDR),
Life of Pi (meh movie),
Star Trek '09 (twice),
Peanuts (meh movie, but rebought to check for banding on new HDR TV),
STID (twice),
Ghostbusters, Ghostbusters II (both because they looked bizarre in SDR),
Fury Road, San Andreas (got them both cheaper in a french double pack),
X-Men First Class (looked poor in SDR but I must revisit it),
Bourne Identity (need I say more),
Bourne Legacy (bizarrely desaturated colour),
Bourne Ultimatum UK (damned player generated subs, bought the US version),
Van Helsing (meh movie).