Yes, the jet noise affect MM as well. If you decide to buy in MM, you’ll have to get used to it. They only fly during the day though, so unless you’re at home during the day, you don’t have to worry about it. I don’t think they fly during the weekend either (at least I don’t remember hearing them)>
NW (north of Calle Cristobal) is the most desirable part of MM, but they’re also the most expensive. There are canyon view homes in Southwest MM as well. SW MM is slightly cheaper than that area of NW. They’re also older. Both SW and NW area of MM to SV is between 5-10 minutes depending on lights. There are several side street that can get you out of MM. You can go north to take SV Blvd/Calle Cristobal or go south to Miramar to get out.
There are a lot of Asians in Mira Mesa (could be negative or positive depending on how you look at it). Due to the large Asian population, there are a lot of Asian food choices (6 Pho places, 3 Asian supermarkets, 4 Vietnamese sandwich places, 3 Thai restaurants, etc). Most of MM does not have HOA (that can be positive or negative depending on what you like). Because there’s no HOA, it’s up to the owners to maintain their homes and not all do that. The NW part does have HOA, so it tend to be more manicured. There are more, but the post is getting long, so feel free to ask me anything else you’d like to know.