I love using my OM10! Despite using a Mamiya 645 medium format camera for some images, I still prefer to use my battered old OM10 (you just can't blow the images up as large as you can with the Mamiya).
I bought my Olympus OM10 in Norwich in 1985. I was looking for a beginners camera to learn photography from the basics up.Little did I know I would still be using the camera twenty four years on.
The camera is a small 35mm slr, roughly similar to look at as many of its contemporaries from the Eighties. But the Olympus Zuiko lenses that it accepts are a remarkable system of lenses. Not because they are hugely sharper that those from other manufacturers (they are very good though) but because the images they produce have a beautiful ,undefinable quality that other makes lack. Many people on the internet forums describe the images from these olympus lenses as having 'a particular look'.It is hard to describe it as anything else, but it cannot be seen when scanned on a computer screen but must be seen on a photographic print.
The built in meter in the OM10 is a wonderful little bit of technology. When the camera is set to auto, the shutter speed indicated in the viewfinder is just a guide. The camera actually has what Olympus calls autodynamics, which detects how much light reaches the film and then when it decides an acceptable exposure has taken place it closes the shutter. It may seem a little dated in terms of technology when compared to the latest digital cameras but what it does do is to give you incredibly consistant exposures when combined with the centre weighted metering. Much more consistant in fact than the latest multi zone meters I have encountered. When you use an OM10 in aperture priority auto you pretty much know you are going to get good results, it even makes corrections if the light levels change mid exposure.
Then when you want to take control just plug in the optional manual adapter and you can play with the exposure levels to get whatever effect you like.
I like the fixed focal length lenses best, not only because they produce higher quality results than the zooms but because they have a depth of field scale, very useful for my landscape photography when I want total control of depth of field.
I have bought more modern cameras including medium format models and while the images that they produce can be blown up much larger due to their larger negative size, I still prefer the look and colour characteristics of prints from my old OM10, plus it is such a delight to use.
If I were only allowed to have only one camera and lens , I would choose an OM10 with the 50mm f1.8 standard lens.

  Favourite films for OM10 photography.

Ilford delta 100 monochrome print film;
 fine grained and contrasty.
Fuji reala 100 colour print film;
 fine grain print film with natural colours.
Fuji velvia 50 slide film;
very fine grain,vivid colours.
Fuji velvia 100 slide film;
very fine grain,bit less vivid colour than velvia 50