Since becoming an administrator, my participation in voting on AFD has declined. I am more into the closing AFD debate business now. Still I do vote sometimes, so I will put down some of my thoughts on the matter.
It is common to divide AFD regulars into two camps, deletionists and inclusionists. There is also an in-between camp called mergists. Some people label themselves as such, and have formed associations. Very many others have not, and neither have I. Well, I have joined this association. I think that the vote should be decided on the article and its subject (in a few select cases other reasons may apply, such as a third renomination after two clear keep debates). It is a bad idea to feel for instance that "I cannot vote delete on this, I am an inclusionist, and it would be hypocritical of me to vote delete!". Don't make votes based on how you label yourself.
The factionalism caused by this splitting into two or three camps is not so good. I have seen users oppose the adminship nomination of excellent and good-faith contributors, simply because they don't agree with their VFD votes. This bothers me (see my admin criterion).
There are nonetheless some classes of articles which often come up on VFD, and my view of them is this: