Why Isn't "Dimension Door" listed under the Metamagic Feat: Preferred Spell
 

I have the Advanced Player's Guide checked, so I have Metamagic Feats and preferred spell, and I see Dimensional Lock and Anchor, but I don't see Dimension Door in the list. Will this be added soon?

Doesn't it require the spell slot to be 1 higher? So 5th level slot?

Preferred Spell
You find it very easy to cast one particular spell.

Prerequisites: Spellcraft 5 ranks, Heighten Spell.

Benefit: Choose one spell which you have the ability to cast. You can cast that spell spontaneously by sacrificing a prepared spell or spell slot of equal or higher level. You can apply any metamagic feats you possess to this spell when you cast it. This increases the minimum level of the prepared spell or spell slot you must sacrifice in order to cast it but does not affect the casting time.

You have to select a spell you can cast once you select this feat. When I tried this, Dimension Door was not available for selection.

The problem may be that I was using a cleric with the travel domain, and perhaps the feat does not look at domain spells when determining which spells you can select for the feat.

I'll have to try tonight when I get home to see whether this is a problem for casters that have Dimension Door on their native list, but I suspect the problem is the domain spell.

That is good research/detective work. So my advice is after you find the answer to put in a "bug report" as without that it will get lost if only listed in a thread.