Is there a drawback I don't know about to buckets? The only thing I can think of that matters is they could get scratched/harbor bacteria easier than glass.
I clean my stuff right away and have never had to scrub a bucket, so I'm not too worried about scratching them, and I know it won't scratch me if I slip doing it, haha.
I don't care anymore if I can watch the fermentation.
I don't care anymore that I have a cool-looking vessel full of beer (yes, I think carboys look cool. It wasn't a reason I got them, but it was a bonus).
I don't even want a better bottle, I don't see the point. Buckets have a big huge opening, easy for pouring into and out of. They have a great handle. You can sanitize, soak bottles, everything in them. they cost less than $10 with a lid.
Is there any good reason to use anything else for this kind of simple brewing?
There are a whole lot of opinions on this, but some people do like to see their yeast partying, as another HBTer wrote.
Personally, I love the buckets and will stick with them even over better bottles. Those wide openings make things easy to clean. I haven't had one scratch on me yet, but it is possible. They also, unlike glass, will absorb small amounts of color and odor from previous brews, but I've never noticed that altering the flavor or aroma of any of my subsequent brews.
A couple other things I like about them... I can line mine with a 24x24 inch nylon mesh bag when I pour in my wort - then I just take out the bag and all the hop gunk along with it and it's big enough that it never clogs.
On my last brew, I put about a gallon of ice (broken down into smaller chunks) right in the bottom of my fermenter and poured my wort right atop it, stirred until the ice melted, then added chilled topoff water until I was at pitching temp.
I was very surprised at how well this worked and how much faster it was than using the water and ice baths I'd been using before. The beauty of the method, I think, is that I'm only cooling the wort, and not the kettle. Any other method, even immersion chillers, require cooling the kettle along with the wort.
This method wouldn't be feasible with a carboy or better bottle.
Now, I typically do 2.5 gallon to 3 gallon boils and top off, so for full-volume folks, this cooling method won't work as well, but for me, it's yet another advantage of the bucket.
Cheers!