I don't vape completely without flavour but I use just a tiny wee bit of flavour. And always the same.
First came flavour fatigue - and I was just tired of looking for a flavour that suits me for longer time. I was saturated and did not
really like any of the flavours. I think commercial liquids are all over-flavoured.
Then I asked myself: Do I use artificial flavour for cooking, do I drink flavoured juices? No and no. Did I smoke cigarettes with varying flavours? No I didn't. So why should I vape with flavour and/or different flavours, just because it is customary to do so? I wanted to stop it.
I opted for Vanilla, looked for a brand that suits me and reduced the flavour step by step. Today, I simply cannot imagine using more than about 0,5 percent flavour (or even less) and as a matter of fact, I could stop that tiny bit too.
And yes: the coils live for ever

. I clean them anyway and change the cotton frequently, but there are no real gunky coils any more.