Yes, I have the center aimed to ear level from where we sit, watch, and listen to movies and music. I won't be able to aim the towers to ear level though. It would be too risky and just too unstable tilting a heavy tall speaker that much. My surrounds aren't aimed at the listening area either. They sound great wall mounted without any tilt at all.
This evening I made a quick temporary prototype wall support for one of the towers just to see how it looks mostly. I think it will look pretty classy having all the speakers similarly wall mounted. My wife loves it because that puts it well off the floor and eliminates the dust traps and dust balls (mixed with cat fur) that tend to accumulate in that corner of the room. Luckily we have mostly bare floors except around the cat lounge and cat tree area and a few throw rugs.
My AVR (Yamaha) has a rather crude sort of auto-cal firmware called YPAO. I really dislike the sound whether done Natural or Flat. Either one accentuates the highs far too much by around (+5 to +6 db boost, especially in the 6K to 8K range) in all five speakers to the point of sounding shrill and harsh. To put it bluntly, it butchers the sound.
I don't fault YPAO though. It's quite a beast of living space and a challenge for such an attempt. If you've ever been in or lived in a casa latina, with mostly bare floors, like tile or wood, bare walls except for lots of large pictures, and lots of couches and chairs angled in various directions overflowing with different sized pillows, then you know what I mean. The HT in the grand room, along with the kitchen and dining area are all essentially one humongous room under a high vaulted ceiling. It is not designed for home theater by any way, shape, or means. I have to use the built-in manual equalizer to get a more natural sound. I've found that a slow treble cut solved the harshness problem in the highs, certainly not by use of treble boost as done by YPAO. I set 2.5 k to -1.0 db, 6.3 to -2.0 db, and 16K to -3.0 db in all five speaker channels. Below 1 K it's set fairly flat. All our musica latina sounds splendidly magnificent that way too. Acoustical room treatments are certainly out of the question.