to me i steer away from commercial. i never wanna do a job where i can get underbid from year to year or dropped in a second because someone offered a cheaper price. that's why residential is my main focus. they are loyal no matter what if you do a good job. heck even if you do a bad job they are loyal in some cases. i see it all the time. they keep so and so because they've been doing it for 10 years already even though they do a terrible job.
as far as high end residential it varies. alot more competition comes into play because all the large companies go for them. they come in charging $35 a cut on a $45 yard. the best in my experience is middle class. less fuss and basically no competition.