Landings are a bit like golf shots. You repeat what you did yeterday for the perfect greaser; today it doesn't work.
Al sorts of factors vary from day to day - visual cues from approach terrain and runway itself - the CoG of the aircraft - the weather.
(It's relatively easy to get into a groove at base training on one runway and no passengers).
Found on the 757 that our perception of the landing could vary markedly from that of passengers or cabin crew - depending on where they were seated. In particular I suspect that passengers equate noise of the gear making contact with "hard" whether there was noticeable g or not.