I actually really like BEST albums so I'm cool with them as long as there's content enough to warrant them. with the right song selection a best album can be a highlight of the artists discography
I like best albums with lot of content, maybe a cd with the singles and other with b-sides and collaborations.
good BEST albums:
"We R&B ~10 years best~" by Double
"LISABEST - mission on earth 9037-" by LISA
"Self Portrait" by hitomi
bad BEST albums:
EXILE's and Kuu's. they're over doing it. Kuu's BESTs aren't that bad, but it was just too much too soon.