I have loads lying around, but usually mine just have 1 bit each that I use pretty much permanently. 1 horse has 2 bits (he also gets too used to 1 otherwise).
We school and jump in a normal snaffle and do XC and hack out in a Kimblewick. We also have a Waterford hanging cheek snaffle that we used while Sam was learning not to grab the bit and run off with mum but we havent had to use that for a while.