One argument in favor of circumcision is that it improves hygiene. The counter argument is that these days hot showers and soap is available so cutting off body parts to keep clean seems to be excessive.
It certainly is true, in most first world countries you are unlikely to die from filth under your foreskin. On the other hand, depending on how obsessed you are with personal hygiene, circumcision still make a big difference about how you feel about yourself. I personally hated the smell of even day old smegma and drops of urine decomposing under my foreskin. Just how many times are you supposed to shower each day to avoid all that? So for me getting rid of that piece of skin was an improvement.
Again, there is a counter argument that it is probably enough to keep the skin retracted all day inside your underwear. Well, the difference may be small during one day, but if you still have a foreskin and you can't shower for some reason for a couple of days it is still going to feel unkempt and filthy. It is not going to be as gross as when your foreskin is covering your glans forming a fully enclosed space, but if you are obsessed with cleanliness you will definitely notice the difference.
I remember when I still had a very loose circumcision. Even with just a foreskin remnant that could creep up the rim of my glans, and cover my sulcus, my penis did not feel quite as clean as after tightening up the cut to make sure that all enclosed spaces are eliminated.
So, while in modern times there are other ways to keep clean, getting a circumcision still can make a big difference in how clean you feel if personal hygiene is important to you.
Of course your sex partner may care about such things too, so being clean and feeling clean can effect relationships as well.
Ultimately it comes down to personal preference but one should not disregard cleanliness, and the subjective feeling of cleanliness as a benefit of circumcision.
Even just making you feel cleaner and better about yourself is in fact beneficial for your self esteem. Thus even in the world with access to hot showers and soap circumcision can have a positive impact on how you feel your personal hygiene about yourself.
