Note: This reflects my (Mitch Grunes's) personal taste.
Some fonts display identically on some browsers on some platforms.

Nice fixed fonts
(all characters are same width, and spaced the same)


0 O 1 l | 2 Z ABCDEFGHIJKLMNOPQRSTUVWXYZ abcdefghijklmnopqrstuvwxyz .,:; Consolas

0 O 1 l | 2 Z ABCDEFGHIJKLMNOPQRSTUVWXYZ abcdefghijklmnopqrstuvwxyz .,:; Consolas (Bold)

Hard to read fixed fonts

0 O 1 l | 2 Z ABCDEFGHIJKLMNOPQRSTUVWXYZ abcdefghijklmnopqrstuvwxyz .,:; Courier
0 O 1 l | 2 Z ABCDEFGHIJKLMNOPQRSTUVWXYZ abcdefghijklmnopqrstuvwxyz .,:; Courier New

0 O 1 l | 2 Z ABCDEFGHIJKLMNOPQRSTUVWXYZ abcdefghijklmnopqrstuvwxyz .,:; Courier (Bold)
0 O 1 l | 2 Z ABCDEFGHIJKLMNOPQRSTUVWXYZ abcdefghijklmnopqrstuvwxyz .,:; Courier New (Bold)

Nice proportional fonts (complex width & spacing; look better than fixed fonts)

0 O 1 l | 2 Z ABCDEFGHIJKLMNOPQRSTUVWXYZ abcdefghijklmnopqrstuvwxyz .,:; Helvetica
0 O 1 l | 2 Z ABCDEFGHIJKLMNOPQRSTUVWXYZ abcdefghijklmnopqrstuvwxyz .,:; Arial

0 O 1 l | 2 Z ABCDEFGHIJKLMNOPQRSTUVWXYZ abcdefghijklmnopqrstuvwxyz .,:; Helvetica (Bold)
0 O 1 l | 2 Z ABCDEFGHIJKLMNOPQRSTUVWXYZ abcdefghijklmnopqrstuvwxyz .,:; Arial (Bold)

Hard to read proportional fonts

0 O 1 l | 2 Z ABCDEFGHIJKLMNOPQRSTUVWXYZ abcdefghijklmnopqrstuvwxyz .,:; Calibri
0 O 1 l | 2 Z ABCDEFGHIJKLMNOPQRSTUVWXYZ abcdefghijklmnopqrstuvwxyz .,:; cambria
0 O 1 l | 2 Z ABCDEFGHIJKLMNOPQRSTUVWXYZ abcdefghijklmnopqrstuvwxyz .,:; Cambria MS
0 O 1 l | 2 Z ABCDEFGHIJKLMNOPQRSTUVWXYZ abcdefghijklmnopqrstuvwxyz .,:; Helvetica
0 O 1 l | 2 Z ABCDEFGHIJKLMNOPQRSTUVWXYZ abcdefghijklmnopqrstuvwxyz .,:; Lucida
0 O 1 l | 2 Z ABCDEFGHIJKLMNOPQRSTUVWXYZ abcdefghijklmnopqrstuvwxyz .,:; Sans Serif
0 O 1 l | 2 Z ABCDEFGHIJKLMNOPQRSTUVWXYZ abcdefghijklmnopqrstuvwxyz .,:; Times New Roman
0 O 1 l | 2 Z ABCDEFGHIJKLMNOPQRSTUVWXYZ abcdefghijklmnopqrstuvwxyz .,:; Trebuchet MS
0 O 1 l | 2 Z ABCDEFGHIJKLMNOPQRSTUVWXYZ abcdefghijklmnopqrstuvwxyz .,:; Verdana

0 O 1 l | 2 Z ABCDEFGHIJKLMNOPQRSTUVWXYZ abcdefghijklmnopqrstuvwxyz .,:; Calibri (Bold)
0 O 1 l | 2 Z ABCDEFGHIJKLMNOPQRSTUVWXYZ abcdefghijklmnopqrstuvwxyz .,:; cambria (Bold)
0 O 1 l | 2 Z ABCDEFGHIJKLMNOPQRSTUVWXYZ abcdefghijklmnopqrstuvwxyz .,:; Cambria MS (Bold)
0 O 1 l | 2 Z ABCDEFGHIJKLMNOPQRSTUVWXYZ abcdefghijklmnopqrstuvwxyz .,:; Helvetica (Bold)
0 O 1 l | 2 Z ABCDEFGHIJKLMNOPQRSTUVWXYZ abcdefghijklmnopqrstuvwxyz .,:; Lucida (Bold)
0 O 1 l | 2 Z ABCDEFGHIJKLMNOPQRSTUVWXYZ abcdefghijklmnopqrstuvwxyz .,:; Sans Serif (Bold)
0 O 1 l | 2 Z ABCDEFGHIJKLMNOPQRSTUVWXYZ abcdefghijklmnopqrstuvwxyz .,:; Times New Roman (Bold)
0 O 1 l | 2 Z ABCDEFGHIJKLMNOPQRSTUVWXYZ abcdefghijklmnopqrstuvwxyz .,:; Trebuchet MS (Bold)
0 O 1 l | 2 Z ABCDEFGHIJKLMNOPQRSTUVWXYZ abcdefghijklmnopqrstuvwxyz .,:; Verdana (Bold)

Special characters
Wikipedia list of Unicode characters
All unicode characters on one web page
Windows Alt characters