Flaps 25 means lower noise on approach and lower fuel flows.
Flaps 30 means shorter landing run required and better pitch angle for autoland.
However, if you wish to land at high ambient temps with high landing weight and short turnround time, then use flaps 30 and full reverse with manual brakes applied below 100 kts (runway length permitting).
If at medium weights and turnround time and runway length not a factor, then use flaps 25 and reverse idle,autobrakes 2 or 3.
Engine wear is more expensive than brake wear.
In all cases, hitting the touchdown point, on the centreline,(preferably firmly when wet) is the best method!!