Where Do You Draw The Line

When I am searching rolls I keep everything I like as I come across it

i save all pre 1959 nickels, s mint memorials, and certain other high priced BU dates for nickels, all other modern nickels and pennies go back out to the bank unless their a variety or error.
-XoG

This is the best answer yet! It really depends on how much you can afford to put aside & how much room your significant other will allow you to dedicate to your collection!

I've been bagging and tagging everything in sight. Putting coins in 2x2s helps me forget my problems. I've finished all of my foreign coins and I'm now working on mt elongated coins. Yup, got the right 2x2s for 'em.

Soon I'll be going back and making sure I have labeled everything with country, value/denomination, and year/mint. Then if I get desperate I'll go back and label composition and ID#. I should have some new victims before that.

The best find from several kilos of foreigns was an 1862 British penny.

If I can't make out the date or it's too gunky, it goes in my cull box. Well, they will when I find it; my three year old grandson has disappeared it, again.

Yotie-
In 1733, Ben Franklin first published Poor Richard's Almanac, an almanac that brought him great notoriety. He sold about 10,000 copies of the almanac each year. The almanac included information of many types as well as popular sayings such as "A penny saved is twopence clear" (which we often hear today as "A penny saved is a penny earned")

So the public fudged up a quote into the "quote" we hear today.

Just though I would add that.

And as far as what to keep, just keep whatever catches your eye or is interesting to you, after all it is your collection.

Just for an interesting tidbit of useless information on this thought.
I live close enough to Philadelphia that I had the chance to visit the grave of Ben Franklin...Ironically his grave stone (more of a slab really) was covered with...you guessed it...pennies (really)

I am small potatoes to just about everyone here. However, I save all copper pennies, and only distinguish wheaties from the other coppers. All 1982s are kept separate for figuring out another day.

I don't roll search anything (but have done pennies before - may do so again). Of course, I always check my change for an out-of-circulation coin or silver. But I don't have much knowledge about (or experience with) errors, so I don't check for them.

pretty boring, huh?

I'm another "copper bullion" hoarder. In addition...

I batch up common wheats (1940s-50s P&D) and sell them to collectors when I have a big pile.
I 2x2 anything especially nice or oddball... for example, I have a bunch of counterstamped pennies- the JFK facing Lincoln, the States, "Love", and so on.
I don't bother keeping "BU" common cents separate unless they have zero flaws visible to the naked eye- those go in tubes.
I've got a Dansco that I'm always on the lookout for upgrades for, and then whatever gets replaced goes into a Whitman folder.
I've got a bin for less-common-but-not-valuable wheats, mostly to keep them handy in case someone is looking for something.

So basically, the only cents that ever get spent/returned to bank are imperfect zincolns.

With pennehs, my rule is that when in doubt, hold on to it!
(which, of course, explains my screen name...)