I use a case of 12 1 liter EZ-cap swingtops, which are awesome! Then, I bottle whatever's left in salvaged 22 oz crown-cap bottles I've bought and emptied, y'know... for research. I fill the 12 liters first and then use the 22's for whatever's left over, usually about six of them.
I always reserve the big boys for consumption at home, because they were pricey, but I love them. They're super-hardy and I usually just pull 1 or 2 out on Thursday, which is plenty for the weekend. The best thing about them is I can pour a pint, re-close the bottle, and the next day the remainder is still cold and carbed.
The 22's are a really nice size to give away or bring over, and I label them so I can save them and compare to later batches, monitoring change through time. The liters take more time to wash, but since there's only 12 of them it's negligible. I don't bottle in 12 oz bottles, just because I can't remember the last time I only drank 12 oz of beer in a weekend. If I was bottling 12-16 oz bottles, I probably wouldn't use swing-tops. For me, the whole point is re-closing the bottle to drink later.