When I come vs when will i have to come

Some examples from the web:

• When I come here, I'm enchanted by this view.
• When I come to Rome I live there.
• When I come to visit the kids, you'll stay with your mother.
• When I come to your place, will you introduce me to your girl?
• When I come into the room. I speak and you listen.
• When I come in contact with a person, they sometimes see a vision of their future.
• When I come to see you, Morell has the same question...
• When I come, they all run away like I was plague.
• When I come into town, I like to just do my business and go home.
• When I come up, I'll show you how Saturday night got invented.
• When I come to work at 1:00 A.M. and I hear little noises here and there.
• When I come to a place like this, I get a sense of how small I am against the vastness of this landscape.
• When I come to a place like this, gradually, a small courage takes hold of me and I feel fitter for things.
• When I come to see you at the diner, I'm not lonely, I'm hungry.
• When I come in for a new gown, may I ask for you?
• When I come for him, I come for you.
• When I come into town now, maybe I'll call you, maybe I won't.
• No. I get free yogurt when I come to store.
• Probably in a few minutes when I come take your order.
• I'll finish up when I come to fix your breakfast.

Some examples from the web:

• Come on, seriously, time to come home.
• That baby'll come whenever it's supposed to come.
• Mr President, the time has come for us to come of age politically.
• Still to come - we countdown more Doctors...
• Please, ivana,I need you to come back.
• - Now we wait for him to come back.
• - Permission to come aboard, Captain.
• You can choose not to come.
• He has the nerve to come back.
• Frances wants Mike to come back.
• Far more importantly, I need you To come back...
• More specifically, his orders to come home.
• - Nobody asked you to come.
• I made the arrangements for this baby to come into the world.
• - and asked to come here.
• He needs Justin to come back to America.
• They chose that moment to come out.
• I just wanted to come home.
• He commanded the beast to come out.
• Sometimes, you just have to come clean, no matter how many dirty secrets come out.