I had waist length dreads, which was probably about 7 years worth of hair growth, cut off completely when I finished Uni years ago. For two days I was dead pleased, then it hit me what I had done and I nearly cried. After about 3 or so months, I got used to it and felt I definitely suit short hair a lot more. The hair line is creeping back a bit these days, so I've now no choice anyway
Wait until the hot summer and you will feel so liberated without long hair, it's great!