This is one of my little pet peevs, a bugbear, gets my goat sort of thing. People fall in love with some fonts, and then want to use them for everything. Some fonts were just not made for web pages though.
Have you ever sent a word document to someone and then saw it on their computer and it doesn’t look quite the same? The reason is often because they don’t have the same fonts installed as you do. The same applies to web pages, if the visitor doesn’t have the font installed, they will see it differently.
For the main text of your website use Verdana, Arial or Georgia.