Yea it depends on the tracks in question I’d say. I used to quickly rush through all the tracks in my mix, mostly because I’d get a bit bored standing there waiting for a good mix out point further along in the track or because the selected song felt 2 repetitive after the breakdown / 2nd verse etc.
Now though I try to pick songs that beg being played for most of their run time / their entirety. I think it’s a good idea to keep a few high energy sections where the mixes come very quickly, but otherwise you should try to pick songs that are good enough to play for longer.
It really depends on your style of djing though. Some prime set-time hip hop dj’s spend the peak hours playing only a verse and hook, or sometimes just the hook of a track before moving into the next song.