The ones that you have the link to look nice, but I wouldn't notice. I notice if her nails are dirty, if she has some really ugly colors, weird designs, or if her nails are so incredibly long that it is a wonder she can even function.
I guess I only notice if her nails look really bad. As long as they are clean and trimmed to a decent length, that is enough for me.
Nails are not too important as long as they are not dirty, or uneven. I like it when girls add some shine to their nails (like in the picture), and have a white strip at the end. But getting really creative with nail polish is not very special. I have a friend who always paints different patterns and pictures on her nails. It's not that attractive in my opinion.
I pay attention to them. If they are clean and well kept or have a nice solid classy color to them then it's a plus. If they are nasty and messy or they have all kinds of crazy sparkles, are way too long, real weird colors or patterns, etc. then it's a turn off.