No real clue on the FA side, but if I had to guess based on pilot trips (the two sets aren't perfect matches), places like SEA, PDX, maybe SAN, and BOI would probably be your best best. Really any place with a large E175s presence will tend to have trips available with longer flights and fewer legs per day so you could get them in ORD, SFO, or LAX even. There's even long leg trips available in CRJ bases, they just tend to go senior when the bids are done.
But, being junior, you will get MSP, DTW, ORD, and maybe LGA or ATL whether you want it or not fresh out of training. And then you will sit reserve and get called out for four and five leg days doing no service turns to places you've never heard of.