Which brands require a bit more love and care? And your guys like the Strikefires over the Aimpoint? If so I really don't know what to say about that one.
I have owned DPMS in the past and it functioned as it was supposed to with the standard level of maintenance. This DPMS rifle was my first LEO duty rifle. I carried a select fire Bushmaster in Iraq and it ran like a raped ape. Again, this rifle did not require any special care to function as it was supposed to. I will also say the same for the LMT, Daniel Defense and CMMG rifles/uppers I currently run. No special care to keep them running like they are supposed to so I would love to hear of specific brands and what extra care was needed to keep them running.
Our guys prefer the Eotechs over the Aimpoints. As far as the Strikefires, we really like the two we have in service but I cannot say they are better than the Aimpoints in terms of long term reliability and robustness. However the Strikefire is sufficient and costs considerably far less, that is a good selling point for some of the younger patrolman who want to buy their own optic for their department issued patrol rifle.
I am not going to get into an argument over which brand is better. I personally own CMMG, Charles Daly and Colt rifles. I used to own a Bushmaster but got rid of it a couple years ago. My department rifles are Colts, Bushmasters, Stag and DPMS. We have Colts and Bushmasters with 10-15k round counts. Bushmaster problems, broken bolts, worn gas rings, action springs, extractors, worn disconnectors, hammers and FCG springs. Colts only issues have been worn gas rings.
I ordered brand new FCGs for our Bushmasters from Bushmaster. First two were good to go. The next four I replaced were out of spec. The officers had to physically push the trigger forward to get the hammer to disconnect. I inspected the hammers and compared them to the two new working BM hammers I had replaced earlier. There was a lump on the malfuctioning hammers that was not present on the others. This caused the disconnector to malfunction. I called BM and they sent me replacement hammers. The replacement hammers were defective as well. I had to file on the hammers to get them to function. I no longer buy BM FCGs. I have never had a Colt fail at the range which was not Mag related. I cannot say the same for BM or DPMS rifles.
DPMS and BM are good rifles, as are many other brands. Keep them clean and lubricated they will function perfectly. I believe that the Colts are more forgiving and have more stamina/longevity over some of the other brands. I do not believe you or anyone else is stupid for purchasing a brand of rifle other than a Colt. I am merely letting know my experiences to create beneficial discussion and increase my range of knowledge.