i have this issue too my blog is a mix bag slash gong show.
a lot of my posts are rambling and trashy but those ones i set to draft after a few hours.
cos i get over it.
really i wanted to have separate blogs but who has the time and energy.
so i just post my most trashy bits in like minded forums but most people dont mind my semipersonal/shop/craft blog, most people that read my blog arent even customers anyway. so even if i spazz on it a lot, i dont leave the posts up on there, and the few friends that have read my blog read it cos they like me already
now im all paranoid. my blog isnt that bad.