Here I am! OK Flossie, here's what I do. I have a policy that if I haven't carried a bag for the last 6 months, it's a definite to go.
Then there's those that I've carried but only a few times - they go on the 'possibly going' pile.
That way I can narrow it down to the ones I use regularly and love. You say you love these bags but rarely use them. If you really loved them, you would be carrying them.
There's absolutely nothing wrong with falling out of love with a bag; getting bored with it or just feeling as if you've had all the wear out of it you're going to get.
Have a good look at them all again. The ones that you've hardly used - get them and out and seriously look at them with your clothes. Are you likely to use them - could you put them with something different for a new look?
If the answer's no - sell 'em or give them away and don't look back!