Reply to On beat vs on time

So I just started Djing like 2 months ago, I have a bunch of friends that DJ , and I usually mix by what i believe will sound good. I wanted some other opinions my friends always say I'm on beat but off time.
- I'll always finish out a 4 count I usually just don't always wait for a 4/4 count.
- Or sometime I mix out at the end of the phrasing

Am I just being a stubborn ammature?