When I first started 'accumulating' (there was no specific pattern or theme) I had to liken my purchasing to an addiction because it gave me a 'high'. Then, over a, roughly, three year period I began to transition out of some of what I had collected. I realized that I had fallen prey to some of the pitfalls of collecting. My number ONE question, now, before purchasing is 'DO I REALLY LIKE THIS KNIFE? Or, am I purchasing it for myriad other reasons, most of which are not good. The novelty wears off of EVERYTHING in time, and knives are no exception. There are, I dare say, few among us who have never said "Why did I buy that ?". So, these days I buy fewer knives, but better and more purposeful knives. My last piece was purchased about a month ago, it was a small Sebenza. I bought it to replace one I used in a trade. I knew as I was making the trade that I would have to replace it, not because it was a CR, but because I genuinely liked that style of knife. The latest issue of Blade magazine (I think it is Blade?) discusses in one of it's features, avoiding the pitfalls of collecting. I did'nt necessarily agree with EVERYTHING that was said, but, I had to concur with most of the points being made. I don't know if there are actually 'mistakes' to avoid while collecting knives, unless you habitually pay too much, because, IMO, the whole process evolves as you go. You eventually figure out what you like, and, generally, can sell off what you no longer care for as long as you have purchased decent quality cutlery. So, as for my collecting, it has slowed to fewer but better pieces.