The "skeletonized" and serrated-faced medium to long triggers seem like the most popular trigger sold on 1911's:

I can't stand them.

I like the short, maybe medium length smooth faced or the gi hatch-faced triggers. With a nice rounded edge.

I don't know why "skeletonized" exist.

Am I missing something?

Another question:

Are triggers normally steel or are there alluminum ones? Are alluminum triggers durable enough?

I'm in the 1911 market (Tisas or Ruger, probably) and it's tough to find just the combo of parts I like on a factory gun.

One of the most common issues is the trigger. I like'em short and smooth.