Hmm…the previous generation Spesh Enduro was a disappointment to me. Too spidery and fragile looking, especially after the solid 2005/6 bikes, even though the ones I’ve ridden felt fantastic.
My own personal disappointment was my Wolf Ridge in a size large. The medium and small are lovely looking bikes IMHO, the large just looks gawky and ungainly. Damn fine ride though.
Aesthetics are a funny thing. Large / XL sizes of the same bike can look dreadfully badly proportioned, not to mention some of the engineering compromises to cater for some of the more exotic suspension layouts out there.
Most improved brand aesthetically? Trek. The old ones looked like the sort of thing Ned Flanders would ride, the post 2007 bikes look very well resolved. I wish Specialized would learn from this and stop painting some of their bikes really gash colours.