The question is as basic as it sounds, I personally own a large quantity of glass five and six and a half gallon carboys but hate cleaning them because I do a lot of dry hopped beers. I also feel that six and a half gallon plastic buckets are much easier to clean, cost less, and are just easier to store in general. Curious what you long term Brewers have gone with. I've been brewing for several years now and have never once had an infection with any of my beers except for one beer that I did with all glass carboys so please don't bring that up, I don't believe its a real issue if proper sanitation is being used every time.