Your brother is 35 and hasn't given your father a grandchild yet? He should get a move on.
You're ready to have kids when you want them. And for you that time is now. If you wait until 30 as your partner agreed and then he changes his mind and digs his heels in about having children at all, you'll be 30 years old, divorced, having to start over with another guy, may not be able get another chance till you're in your mid 30s, forced to go the IVF route because you waited too long. I'm not saying it's going to happen to you, but I have a 34yo friend who gave up 10 years of her life to her douchebag ex hubby who didn't keep his word about starting a family at 30. She's considering going the single parent route and purchasing a sperm sample from a bank.