Its mainly my wife and I that I brew for, and she really just drinks hoppy beers. We don’t drink every night so 5 gallons tends to become a chore to drink if it isn’t something we both love, especially if its something only I am drinking. I bought the 3 gallon pin lock kegs from adventures in homebrewing when they were on sale. I got them to make smaller batches and to have more variety. I have a small kegerator with only have two taps. I have been really happy with them. I have ball locks on all my 5 gallon kegs, but I have flared fittings so switching out isn’t a problem. If it is something I know we both will want, I brew 5 gallons, if not, I do 3 gallons. I like the flexibility. The main problem is a good beer goes twice as fast in a keg half the size. Twice the amount of disappointing times of blowing foam. I have split batches using different yeasts which is pretty cool. It takes less time for me, I can do everything in my kitchen, and there is definitely more variety. For my next batch I plan on splitting it and trying different hops and maybe different yeasts.