I bought a couple swing-top 2L growlers today. For each 5-gal batch, I plan to use one 2L growler, six 12-oz, one 22-oz, and the rest 500mL swing-tops (I think, 24 or so).
The guy at the LHBS said the large growlers might need a different (smaller?) amount of priming sugar? He didn't have a great explanation, just that he's heard from others that they tend to over-carbonate? How is that?
So far I've just been doing 500mL swing-tops and a couple 12-oz bottles I'm tucking away to try after a year. I've been brewing less than a year, so haven't experienced the effects of different bottle sizes.
Edit: I use dextrose for priming, which is mixed with all of the beer in the bottling bucket prior to bottling.