It's a personal thing. Here on MacNN, there are people who like it and people who hate glossy screens -- including professionals. Of course, professionals tend to be more conservative (they also needed longer to switch from crts to lcds). No amount of discussion will change personal taste.
Just two things:
(1) Glossy displays take some getting used to (usually not long). Rarely anybody uses them in the worst conditions (display switched off with a point-like light source in the back).
(2) There is no inherent difference in technology between glossy and non-glossy displays. Glossy displays miss some compensator foils that are put on top of the panels of displays with matte surface. These foils make the surface of the display rougher and are the thing that disperse incident light in all directions.
The trade-off is that these foils absorb light and thus reduce the gamut (the range of displayable colors), the contrast and the brightness. If you use proper equipment and you calibrate in the dark (which, according to the documentation of my ColorSpyder 2, I'm supposed to anyway), you can calibrate glossy displays in the same fashion as matte displays.
Disclaimer: I'm typing this on a matte ProBook connected to a matte 24" Sun TFT.
