for me the type of commute makes a huge difference – a 30 minute commute at freeway speeds might be OK (20 minutes was my limit) but 30 minutes of heavy traffic / stop-and-go / assholes playing the ‘no you aren’t getting in front of me’ game / etc would not be OK
that factor would keep me out of La Mesa / San Carlos / etc if I had to commute I-8 east between 4 and 6 PM everyday
I’ve never seen I-15 north NOT be like that north of Mira Mesa Blvd regardless of the time of day so any housing north of there is of zero interest to me – likewise for I-5 north of the merge