Please don't take it as a personal attack, but you're 28 and from the way you're talking, it sounds like kids are not a priority for you right now, so apparently you want to do certain things before getting them. Many people who end up child-less are just like you - they don't actively decide "I'd rather game than have children", they just make excuses and postpone until it just doesn't work out at all.

One thing which I kind of regret about having children relatively late in my life (although I wasn't that much older when I had my first than you are now) is that I won't be there for them (and potentially grandchildren) as long as I wish I would be, esp. in good health. A depressing way to think about this is that every year I've enjoyed the freedom before them is a year I'm not going to spend with them.