I look at Pinterest like an online filing system for things that interest you.  I do a lot of DIY things, so I spend a lot of time in crafts and DIY.  Within your profile you set up catagories.  I set up one for "DIY" that way, when I find something on Pinterest I may want to make or do later I can then easily find it in my profile under DIY.  It saves my old aged mind from having to remember what it was called, and where it was that I seen it and having to go find it again.  We have also been doing some redecorating so I have different catagories set up for different rooms I am working on and when I find something I'd like for my kitchen, I repin it to my kitchen catagory.       
Honestly, I don't really get the idea of having friends follow you though.  Except that maybe they will find something that you too might like, but I see it more of a personal filing system of ideas and inspiration.  That's the readers digest condensed version.  LOL     
				__________________  Shelly and the girls   Moka  Mylee      |