Lot of good discussion here lately. Couple strong opinions I have that I wanted to share that came to mind when reading it.
1) No-one should ever put their Standard away, even if someone has no desire to show, if you plan on hatching any birds you should be looking to the standard. It is what defines the breed, it is the the description of the ideal conformation for the breeds original purpose, and the first 80 pages or so that everyone skips over is the most important 80 pages there are written on poultry.
2) If you really want a certain variety or breed, go for it. You will enjoy the hobby more and last longer. Don't get caught up in fads. Doesn't matter if it's rare or not, doesn't matter if you start with poor stock at least conformation wise (as long as you have the knowledge and are willing to put in the work to improve it, which is more likely if it's the exact breed and variety you want). That is the only advice of my mentor that I didn't take and I'm glad I didn't, he encouraged new comers to get something easy, no feathered legs, no big tails, single combs, so that they could have an easier path to success...I didn't listen and started with Langshans which violated 2 of those, because when I looked through the standard, those are the ones that stood out to me. That was 20 years ago and I'm still in poultry and will be for the rest of my life, only two other kids from those days in our club are still involved at all in poultry. This would not have happened if I had settled for something I didn't want...of course to be honest I still love that breed, but I have also grown an appreciation for many others.
3) When it comes to difficulty Blue, while far from easy, is simple to breed compared to Columbian (right amount of color in the right spots), any duckwing pattern (I am convinced this pattern is what invented the process of double mating separate male and female lines), crow wing (how much lacing should be on the breast and at what age? How do you best get that without losing the color in the hackle?), crele (all the problems of a duckwing pattern and add barring!), spangled, mottled, mille flour, the list goes on.