Speaker driver sizes - pros and cons

Here are typical differences. These are not cast in stone.
Advantage of small driver:
better frequency extension in the treble region
smoother midrange response
tighter focus in imaging & soundstage
Easier to use in any size room (smaller)

Advantages of larger driver:
Moves more air for more impact in midrange and bottom frequencies, large rich images.
Better excursion limits for better power handling
Normally produces large rich soundstage
Normally higher sensitivity

Disadvantages of small driver:
Less power handling
Cannot portray the large orchestral experience as well
Limited Frequency response in bass
Normally less sensitivity

Disadvantages of larger driver:
Normally not near the treble frequency extension
Normally not as clean in the midrange
Normally requires a much larger cabinet
Beaming is often a problem

timlub, you forgot to mention that smaller drivers are usually faster than larger drivers - less mass to push and pull back and forth.

Also, I disagree that small speakers can't reproduce a large orchestral experience.  You just need more than one; active and range limited or passive.

After years of owning, testing and listening to all types and sized of speakers and main drivers from 2"-15", I prefer a single driver (or dual as mentioned above) no larger than 8' and coupled via high level output to a pair of very good subs.  This combo seems to work best for me, but I should also mention that I am driving tube amps ranging from 1Wpc SETS to 50Wpc push-pull.
 

@br3098 
Hi br3098.... I didn't forget to mention that at all.... I don't believe it.  I've heard 15 inch woofers that are very fast and dynamic.  Mass vs Motor tell the story.  As long as you have enough motor structure to push the mass speed is not an issue.  The problem lies when you start having too much motor. Yet another subject. 

I don’t think you’ll find a 12” driver that is actually considered full range. Those larger drivers are normally used for PA applications and their frequency response is within the midrange band. Anything larger than an 8” driver will require a crossover to a tweeter. That’s been my experience when trying to build my own single driver (audiophile) speakers. YMMV. 

timlub, with all due respect I do not agree for several reasons:
1- Mass is always an issue.  Larger motors do help, but the reaction time also increases; larger motor or not.
2- Mass vs motor: over-driving the cone is typically only a concern with larger speakers.
3- Larger speakers have more issues with wave propagation timing and scattering effect.

I have owned and heard lots of great 12"-15" speakers.  But in the same family, for example, I have never heard a 15" cone driver resolve more midrange and top end information than an 8' version of the same driver.  All things being equal and in the same family.  More bass, yes.  Better response across the entire bandwidth, sometimes yes but no more often than not.

My assertions above assume we are limiting our discussion to dynamic drivers and not compression drivers, correct?