We've been burgled. Lived in an area routinely described as 'leafy' and prosperous, but in a fairly small house. They broke in during the small hours while we were upstairs asleep, and I probably disturbed them because I worked an early shift and got up, had a shower etc before noticing a draught coming up the stairwell - which was wafting in from the open front door. They rushed out when they heard me moving about, we think. I was astounded that we heard nothing while they were breaking in and roaming round downstairs.
They went through everything downstairs, took my bag with my purse, keys, cheque-books, phone, a camera or two (not massively expensive ones however), but evidently didn't want our ancient telly and DVD!
However, because they had my keys, they stole our car, which was parked right outside.
Long story short, the police found my bag a week or so later, chucked into a garden round the corner. My purse was still in there with my credit cards & cheque book - money still there too. They dumped the cameras as well, along with other bits of swag from other houses. And about 2 months later, the car turned up, completely unharmed, after someone reported it as abandoned in a less, ahem, salubrious area a few miles away.
So all they got was my phone and an electronic organiser-thingy (pre-iPhone days), and created massive hassle because having been told by the insurers to replace things like my lost purse, they then refused to pay out when the items re-surfaced. It was probably kids.
We immediately got the best burglar alarm we could, and never left things like bags or keys downstairs overnight. We also got a massive bolt for the front door - they got in by fishing through the letterbox with a coat hanger and slipping the catch back on the door, which is a common dodge, apparently.
We moved a while later and the first thing we did was upgrade the alarm, always use it - even at night - and had window-locks installed everywhere possible. It cost a lot but is worth it to feel safer.