aaaaaaaaaaaaaaaaaaaaa
Doesn't it look really odd, all the a's next to each other?

I'll try it out with different alphabets and see which looks the oddest:

• ssssssssssssssssssssssssss
• uuuuuuuuuuuuuuuuuuuuuuuuu
• llllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllll
• eeeeeeeeeeeeeeeeeeeeeeee
• qqqqqqqqqqqqqqqqqqqqqq
• kkkkkkkkkkkkkkkkkkkkkkkkkk
• fffffffffffffffffffffffffffffffffffffffffffffffff
• bbbbbbbbbbbbbbbbbbbbbbb
• ooooooooooooooooooooooo
• iiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii
• mmmmmmmmmmmmmmmmm
• xxxxxxxxxxxxxxxxxxxxxxxxxxx

Ok they all look weird.
Maybe k looks funniest
Hey, come to think of it, they make a really good pattern when put together!