As a man you have a bigger reproduction window than women.
True, but don't rely on this too much and put things off, particularly in these times. Our sperm counts are going down, and fertility on both sides is getting more difficult, not to mention the increased rates of deformities and impairments in children from older men. Let's not forget the possible problems of even getting it up as you get older.
So if you're putting it off just "because I have time" don't - just like with women, things may not turn out how you want them to.
Sucks, but men and women should really be encouraged to have children and start families earlier, then focus on their careers when the children are ready for school, but lord knows our societies are not built for that.