OMI stands for “Open mind Index”, as they said it. Here this utility can actually help you to calculate your openness for the variety of music. All you need to enter your last.fm username to generate this graphical statistic given below.

For this, of course you need to have a profile on last.fm, those who don’t know what last.fm is, it’s a social music site where you send data of about whatever you listen on your computer. This is done with the help of a small plug-in available for download after you sign up for service. When you enter the username, your music data (most specifically, top artist of last 12 months) is downloaded from the last.fm site and used for calculation.
The following table lists the OMI values and there corresponding description. (Mine is 119)
Below 20: an extremely small bandwidth of tags; a faker or fanatic of an artist
20 - 39: a small bandwidth of tags; a fanatic of a specific tag
40 - 59: a small bandwidth of tags; a fanatic of a few types of music
60 - 79: a substandard of bandwidth of tags
80 - 89: a balanced bandwidth of tags; a little below the average
90 - 99: a balanced bandwidth of tags; the golden mean
100 - 109: a balanced bandwidth of tags; a little above the average
110 - 129: a high bandwidth of tags130 - 149: a very high bandwidth of tags; truly open minded
above 150: an extremely high bandwidth of tags; an absolute freethinker and freak
Apart from the above, site also list the global statistic, worth to checkout (http://www.musickum.com ).