I like PCGS and NGC in general. CACG is starting to make thing interesting with their grading standards. I only have 2 CACG coins, but that is mostly because the lower supply of them since they are a new company.

I voted for cacg just to even things up a bit...
I wish the services would return to technical grading and let the collector determine value. I remember when toned coins were looked down upon and untoned examples were the most desierable. But over the years toneing became more and more desierable. So, even though toning has no impact on a coins technical grade, it does impact its value. So today toned coins are hot. They get a higher market grade because of it. But what happens years from now when the trend changes and untoned original coins become more valuable and you now have all these overgraded toned coins to deal with.

For German coinage what I mostly collect I try not to be to bias towards 3 grading companies I buy the coin not the plastic …. I have a soft spot for old white ANACS and NGC fatty slabs when grading was more conservative … although I do have more PCGS slabs in my collection …. I wouldn’t mind having 2 grades on slab one for obverses and one for reverse …

I’d like to see separate grades closer to NGC ancients. A grade for strike, eye appeal, and perhaps color/tone.

I'll only send world coins to NGC, but keep my US stuff PCGS because they have better online options to enjoy my collection.