Right now the trend in flashlight design is to go with the "tactical" aesthetic, with everyone skewing towards that rugged I'm-a-Navy-SEAL look. But it's nice to see at least one company, Icon, doing something different. The Solo, up top, is a pen-sized flashlight designed to clip into a pocket. The Link flashlight, below, has an integrated carabiner and comes in bright orange so that a) you can always keep it clipped to you and b) if you do happen to set the thing down, it should be easy to spot amidst the clutter of your other tools during a job.
There's video of Icon designer Paul Kim explaining some of the decisions he's made at this link. English is not his first language, but those with linguistic patience will hear him discussing the trade-off designers face between manufacturability and getting the ergonomic form you want.