A few things, speaking as a Texan transplanted to the Boston area. First, get used to commuting when there’s 6 to 12 inches of snow on the ground; that will slow things up, but it won’t shut things down.
Second, make sure wherever you settle that you’re okay with the length of the commute. My train ride into the city is about 45 minutes, and after 15 years here I’m okay with that. But I know people who moved say 75 minutes away because it was cheaper and grew to regret it.
Let’s see, what else. Drivers here are more polite than Texas (not sure about CA), don’t let 'me tell you any different. Half the time you put on a lane change signal they’ll actually let you in.
It gets cold here. I know it’s been mentioned, but it bears repeating.
Finally, a LOT of the area around New England is woods and hills, it’s fairly surprising. And along those lines, two hours of driving in any direction will get you somewhere scenic. ETA: though due East might be a bit traumatic.