I've completed my review of the 50 state license plates plus DC. I used the current general passenger plates which are most often seen on the road ie. I did not include newer 2011 plates issued to new registrations.
These are the plates I used.
The following are loosely ranked in order of best to worst in each category.
Best plates:
New York – Represents both parts of state well, nice combination of colors, easy to read, pleasing to the eye
Vermont – Unique color, easy to read, simple yet effective
Idaho – Good colors, eye-catching but not distracting, balanced, symbolic, easy to read
Ohio – Easy to read, pleasing to look at, eye-catching, good separation of color, light background detail not distracting, info about state well placed
Pennsylvania – Easy to read, eye-catching but not distracting, one of very few states to use gold in a way which is not off putting
Other good plates:
Illinois
Minnesota
North Carolina
Maine
Louisiana
Oregon
Florida
Connecticut
Massachusetts
Colorado
West Virginia
Decent plates:
Washington
New Hampshire
Tennessee
Iowa
New Jersey
Georgia
South Carolina
Alaska
Texas
Kansas
Nebraska
Kentucky
Rhode Island
Nevada
Mississippi
Terrible plates:
Indiana – Good colors but off balance
Maryland – Not a terrible plate but the colors are strange and the logo is busy and too small
Wyoming – A nice design, too detailed, off balance
South Dakota – Decent colors but cursive South Dakota is hard to read and font is strange
Arizona – A nice design but off balance with hideous colors
Alabama – Far too busy color-wise
Utah – Ugly font, bad colors, too busy
Oklahoma – Far too busy, trying too hard.
North Dakota – Bad colors, small illustrations, highlight around state name and font color are not appealing
Montana – Montana name is hard to read, off balance, lower mountains are randomly placed and busy, state outline is nice though
New Mexico – Ugly illustration, off balance, lacks upper text to balance
Washington DC – Off balance, busy, capitalization is unnecessary
Delaware – Boring, out of place, looks antiquated
California – Boring, lacks illustration
Michigan – Boring, lacks illustration
Wisconsin – Boring with badly placed and small illustrations
Virginia – Boring, lacks illustration, off balance on bottom, font too small.
Missouri – Little bird is too small, colors are good, position of sticker is strange in middle of state outline
Arkansas – Bad design, illustration of diamond tells me nothing noteworthy about the state and is also crammed, bad colors
Hawaii – The rainbow is flat out hideous against the blank white background