In the first, a man tells Jesus that he wants to go where Jesus goes, but Jesus tells him that it's not about a place. Jesus's call doesn't have a final destination or pilgrimage; it's something that we are supposed carry with us all of our lives. It's not something that we fulfill by going to a church or attending specific events, but a call that leads our lives every day no matter where we are.
In the second, a man asks to first fulfill an obligation for his family before following. Jesus tells the man to leave the task (burying his father) for others (the dead). Too often we allow our daily obligations to come between ourselves and Jesus. We put off Jesus's call to deal with the mundane when Jesus should be a part of all of our daily tasks.
In the final story, a man asks to first bid his family farewell. Jesus then warns about regret. He is telling us that we should not choose His path with hesitation or fear for what we might lose. I like to think that Jesus was also telling this man that he should include his family rather than consider the two callings incompatible.
Jesus is calling to us, but He does so on His terms, not ours.