Do you collect variations?

I'm just wondering how many people collect variations of cards when collecting a set. If you do, do you collect just the ones recognized by the "experts"--Beckett, PSA, etc.? Or do you collect all variations that you're aware of?
Here's an example: I received a 1963 Fleer Larry Grantham with no stripe yesterday. PSA doesn't recognize it as a variation, so there's only one Larry Grantham listed in the 1963 Fleer registry. Do I keep both the striped and non-striped examples? (In the 1963 Fleer set, cards with numbers divisible by 4 were printed both with and without the bottom stripe on the back.)
I've been inconsistent: I've been keeping examples of the variations in the 1963 Topps football set, but not in the 1963 Fleer set. No good reason, I just started down different paths with the two sets.
What do y'all do?
Here's an example: I received a 1963 Fleer Larry Grantham with no stripe yesterday. PSA doesn't recognize it as a variation, so there's only one Larry Grantham listed in the 1963 Fleer registry. Do I keep both the striped and non-striped examples? (In the 1963 Fleer set, cards with numbers divisible by 4 were printed both with and without the bottom stripe on the back.)
I've been inconsistent: I've been keeping examples of the variations in the 1963 Topps football set, but not in the 1963 Fleer set. No good reason, I just started down different paths with the two sets.
What do y'all do?

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Comments
For the 52 Bowman set i only did the Werle variation not the many others where the card stock was a tad different.
So yes I try to.
Their is a great web page that lists all the variations written by OBC member George Vreckech.
Steve
I have just started my 1982 blackless set -- since its all variations -- I will make an exception !
anyone with blackless 82's give me a shout !
Topps White Out (silver) letters Alex Gordon
80 Topps Greg Pryor “No Name"
90 ProSet Dexter Manley error
90 Topps Jeff King Yellow back
1958 Topps Pancho Herrera (no“a”)
81 Topps Art Howe (black smear above hat)
91 D A. Hawkins BC-12 “Pitcher”
my favorite being the 1962 baseball set with the green tints.
Nick
Reap the whirlwind.
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So for me the answer is yes...Donato
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