I agree with Cerise and Viktor's perspectives in relation to making the choice to have a vasectomy done, it is a personal choice however because it can be permanent you should be clear with yourself about your motivations and be aware that if those motivations are based on emotions and feelings in the mind, they can change over time as you change.
My partner was looking at having a vasectomy, partly because he has diabetes and wouldn't want to transfer it to his children, but also partly because he has never seen himself to ever want children. After we both investigated the point we decided to hold out on the vasectomy because a. technological advancement might in time to come be able to prevent the diabetes gene from transferring and b. the want for the vasectomy was very much based on how he sees and experiences himself now, as a 26-year-old still trying to find his footing in life, and not on the consideration that his situation as well as his self-experience may change in the future. So in terms of our situation, we decided that there was actually no real rush to have an operation like that done. But each person and situation is different so there is no right or wrong, just self-honesty.
In terms of the physical consequences I would suggest to ask your doctor, or whoever would perform the vasectomy, about that cause they would be the best equipped to provide that information.