Which is probably why I've never gotten into it as much. One of the parts I love most about opera is how different interactions can be represented in music, which is why I've never been a big fan of opera seria. Characters interact during dry recitatives, but not in the
music. If you're lucky enough to get a duet or a trio, each character usually sings individually, and when they sing together, it's a love duet, so they sing in 3rds or 6ths. In other words, the characters are not themselves individually distinguished. This is, of course, why I am a great admirer of the late Mozart operas.
Having said all that, this trio you've posted is absolutely lovely -- the textures and melodic lines are well-wrought, and the passion guides the music tastefully. Now that I hear it, I am pretty sure I've heard this before, but quite a long time ago. It has definitely convinced me to do more thorough investigation of Handel opera than I've done so far (which has been more random than thorough). You may have converted me yet, Handel!
Actually, this trio reminded me immediately of the exquisite sextet from The Marriage of Figaro, in which the agitated music of the Count and Don Curzio (the march rhythm and minor seconds) is contrasted with the loving legato music of the remaining quartet Susanna, Figaro, Marcellina, and Bartolo. In that sextet, the opposing interests and emotions of these two groups is presented wonderfully, and the exact same effect is here in this Acis and Galatea trio. Mozart didn't arrange Acis and Galatea until a few years later, and I am not certain when he first encountered this work, but I can't help but think that Mozart might have thought on this trio when composing the sextet from Le nozze di Figaro.