Xkcd Password Generator
I've been using phrases and sentences as passwords for a while, and I've found that there are 2 main problems;1) A lot of sites, still in this day and age, have max password lengths, so I still have a lot of short passwords.  Usually this is bank sites and the like.2) Password entry fields are often very short visually, and with a long password getting lost is much easier. I find I have to type them over A LOT.The second is actually the more annoying problem.