EVERYTHING tastes better in glass. If you're old enough, remember what Coke tasted like in glass bottles? Damn I miss them!! Can't get large glass bottles of Coke in Chicago. Only those damn 8oz bottles and they cost a bundle.
My preference is glass for the larger bottles (30mL and up) and plastic for smaller sizes.
I actually like both. Larger bottles I like in glass but I also enjoy having the small ones, like 3 or 6 ml bottles, in plastic that I can easily carry with me for easy dripping.