Newbie VOR question

I'm not a pilot but I have been reading up on VOR stations. And I'm
looking for practical information.

You can calculate your position by triangulating from two VOR stations.
How many pilots do this? Or do most just fly between omnis? When you
fly cross country do you just fly VOR to VOR, or do you draw a straight
line to your destination and constantly triangulate while enroute to see
if you are on this line?

Is it practical to fly a straight line course? Anybody do this?

Thanks for your help.