I've generally found that (in the resorts at least) the best time to be out on the bike and get some sweet trails to yourself is between 17:30 and 21:00 (light allowing) as thats when the blue rinse brigade have their half board meals, I also like 06:00 to 09:00, but that hardly ever actually happens!

I also have to say I find Switzerland's MTBing fine, if not stunning! Coming from Kent in SE england where I have seen burnt out caravans, wires streched across the trail, chavs on motocross bikes and chavs throwing stones at anyone biking past their 'campsite' Switzerland is a paradise. To be fair all the trails I rode in SE england were nearly all hiking paths, just they are not so popular with the hikers.

I seem to remember there being some nice routes in Villars - sur - Ollon and in Crans Montana in French Switzerland, though it's been a few years since I've been that way.

I'll write up some of my local trails (time allowing!)