I like some of them and I'm going to be getting a pair of Golden Bristlenoses soon. There are so many variations of them though that it's almost impossible to state they're all one thing or another.
well I picked "can't have a tank without them" because I would rather not have a tank without them. but in my planted tank they can damage leaves and uproot plants, so I keep them in my other tank.
You're thinking of Commons and Sailfins. While some people like the look of them, as a whole, they're a poor representative of the 100's of Plec species out there.
Common Plecos (Ugly)
Bristle Nose Plecos (Little Less Ugly But Still Ugly)
SaleFin Plecos (Ugly)
Zebra Plecos (Not To bad if i found one i might buy one)
Clown Plecos (Ugly)
Asian Plecos (Really Ugly)
Bushy Nosed Plecos (Ugly)
Snowball Plecos (Ugly)
They are a must have in every tank. I believe the people who think they are ugly have never really looked at what is available. Granted a giant common hanging on the front glass may be an ugly sight, But how could you not fall in love with this little gal?