Oh Brit - YES!!!!!
Collars are my thing too....probably because Harry absolutely HATES clothes and he NEEDS a little bit of special (or bling, or seasonal, or whatever!!!

).
We also have charms that I attach to whichever collar's D ring that suits at the appropriate time (i.e. a sparkly green Christmas stocking, a tiny coloured enamel lighthouse for when we go boating etc.)
How sad is that?!!!!!!!?

Sally + Harry x