Depends on what you do every day, like if you have a job where you need to look a certain wAy then it matters quite a bit. I dont have to be dressed up and look great at my job but I do need to adhere to a certain standard. Ah hell... I look great every day.
I'll be the fist to admit I spend an hour showering and getting ready in the morning but I like to impress others there isn't much wrong with that. Besides those who do try to make themselves presentable usually have a higher confidence and usually feel good about themselves. I'm not say to over do it but just enough.