OCD Heaven, that's what it is. Obsessive Compulsive Disorder strikes dozens of people a day, and they're all living inside you. 7 Attentions Coin Sorting, that's what you want to get hold of and apply to your OCD habits, and it starts with Rule #1 for Lincoln Memorials:
There is no reason to collect any less-than-perfect Lincoln Memorial coin.
Now, granted, that doesn't include the special cases and all them there fancy mint errors, but it does clear up a lot of unwanted informational clutter and get us down to brass tacks, where the money is. Unless there's a compelling reason to do so -- such as a wild rainbow coloration, or an unusual mint-mark, rpm or other similar manifestation of The Goddess Numisma, just don't take a bad coin -- meaning a coin that is less than your target grade for LincMems, which is???? That's right! If you've been paying attention, you'll know that the correct answer is: GEM BU = Gem Bright Uncirculated.
Of course, "uncirculated" doesn't mean what you think it does. Stay on the Bright Side.