Couldn't find the answer so writing here if anyone can fill me in. Have an interview lined up with Skywest soon. Will be picking the CRJ if given the offer. Wanted to know that do they choose the CRJ-200/700/900 or will we be given the option for that too? And if so, does the 200 have shorter trips compared to others? I am trying to opt for an equipment where it would mostly be 1 day trips majority.

If you are CRJ, you will be checked out in both the 200 and 700 and be able to fly both at any time. You are not fenced into any variant (unless you haven't received a line check in that variant yet).
Initial ground and sim will be in the 200 and the 700/900 differences class will occur after completing your checkride (or relatively soon thereafter).
You may or may not not get line training on the 900 if your base doesn't normally fly them. This would prevent you from flying it on the line, but you are still expected to know it's limitations for annual training.

Edit: 1-day trips are called "locals", and usually go VERY senior (base dependent). Expect 3 and 4 day trips to start.

There is no base or equipment that has mostly locals. Take August for example: system-wide, 1-day pairings accounted for less than 7% of total credit hours for the month. Denver ERJ has 8.3% locals and 68.5% 4-days. I imagine that CRJ side is pretty close to that as well. Locals also go very senior. I’m currently top 50% seniority in Denver and can’t get anywhere near a local unless I pick one up on a day off. I was roughly 35% seniority on the CRJ before I transitioned over to the ERJ and I couldn’t get locals on that thing either.

Enjoy several months of AM short call reserve and then several months of a composite line and then quite a while of absolute trash 17hr 4-days with min rest overnights.

Don't come to an airline thinking your going to doing day trips. After a couple years you’re going to become absolutely miserable because you’re doing a four day trip, again.

Is this true for travel companion and enrolled friends as well? i.e. no segment fees other than the annual enrollment fee for domestic travel?

edit: So it appears non-employee travelers have to pay segment fees for UA, how about on AA?

Hey reviving this thread again. I was wondering what the "dedicated to the operation" means for airlines non-rev benefits? If I have delta/united "dedicated" during training, do those go away when getting assigned a base? If I had a listed travel companion and I became "non-dedicated", would they just go away? If anyone understands this, thanks for the explanation.

CRJ is always dedicated to delta and united, you get AA benefits if you're in an AA base but if you transfer out, you lose them with no refunds

Ok thanks that's good to know and plan with.

Also something to consider, now that we have American Eagle ERJs in LAX, we are the only pilot base with benefits on all 4 partners.

I read a post from years ago where someone claimed all ERJ pilots get UA bennies, regardless of base. This true? What bases for ERJ get Delta/AA bennies?