Up north, there is some really good bass fishing...however, there are also plenty of lakes where there are a LOT of bass, but they all seem to run a pretty small size (9-13 inches).

I've found that lakes that have a steady drop off into about 20-30 feet, water that is clear for the first 4 feet or so, but after that- your lure disappears into the abyss, no weeds or noticeable rocks-just some tiny little pad like plants on the edges and under 30 acres-are often full of small bass and some bluegill, but nothing really else. 

What are some characteristics you've noticed in lakes that have a lot of bass-but small?