MrB and I had a conversation during our last mouse visitation. There were two of them in the loft but it sounded like there were dozens having a ceilidh! Noisy buggers! The thing is, mice really want to live with we humans and if they weren't such destructive little beasts (and noisy!) we felt sure we could have come to an amicable arrangement with them.
As it is, I've overcome my jitters about them over the years with good traps (made by a well-known pest control company) and chucking them into the field alongside our garden for crows to scavenge.
Now if signs show they're inading again, I just think "Blighters!" and set the traps which, as well as being efficient, are also humane as the mouse doesn't know a thing about it and dies happy with a sniff of peanut butter in its nostrils.