To the initial question - I find my $1s are workhorse for our .25/.25, $25 buy-in game. To guarantee there’s enough change to go around, I’ll often do a barrel of quarters and barrel of $1s for the first 5 buy-ins, or some other variant that gets the entire rack of fracs in play, and then there’s for sure already enough on the table for the rest of the night.
As far as why we play .25/.25, first, it meant I didn’t have to chase down another denomination of chips, and while I love playing with Paulsons, I am also balling on a budget over here. Secondly, it just made change less annoying - when stacks include dimes and quarters, sometimes you end up with really annoying totals for all-ins or side pots or cash outs, and only dealing with quarters just made that much easier.
It barely functionally changes the game - the SB will be in pots some percentage more of the time because it’ll be slightly cheaper to complete an open or check through a limped pot, and I guess late positions might be a percentage more aggressive because there’s a whole 15 cents more in the pot they can steal - but in reality, it’s such a minor effect that the upsides and benefits are way worth it.