Good move on applying to many agencies, especially Fed agencies. Get your fed time started, while you wait for the agency you really want to hire you.
CBP is great because it gives a decent amount of broad experience, tons of immigration, and some customs. Many ex-CBPOs have gone to FBI, USMS, USSS, ICE-HSI, yes you will have to go through FLETC again.
With CBP the criminals come to you, you just have to find them through the crowd of good people.
Three types of port -- airport, land border, seaport ... choose WISELY
If you applied for Southeast region, i doubt you would get Texas or anything west of. You would probably get an airport, Atlanta or a seaport.
The action you want is on the southwest southern border, they say its the wild west down there, getting into fights and catching drug loads. But also working double shifts every OTHER day, and working in the summer heat outside. There is a high turn over rate, also you will be living in a border town, which sucks, and everyone will know you are CBP/BP. The amount of corruption coming over the border and in the border towns will astound you, and make you feel like your on the losing end of the battle. And thats just from the stories ive heard. You will be exhausted, want to quit or transfer to another port, probably a seaport, and hate management.
If you get an aiport, you will be stamping passports all day, for years. Then move up to searching through dirty laundry. Not much movement outside the airport, you will hate the passengers and management, and will want to transfer to a seaport.
If you get seaport, you will watch trucks drive by everyday, and be bored. Maybe do a ship search, immigration on a cruise ship, open boxes in a warehouse and get dirty. You will be bored and hate management, but you wont want to leave because you know the airports suck and so does the southern border. Seaports are where you go to retire.
CBP is the DIET version of law enforcement. Very few local agencies will respect you and know what you do, only the southern border locals will understand.
A good thing with CBP is that you can do TDYs to Canada for pre-clearance, and go to other coutries for Container security.
USBP would be fun, if you like running around the hot desert, and living in a dumpy border town.
I think CBP will have very little to do with the current immigration mess, because the immigrants are going directly to USBP, and are held and transfered around by ICE-ERO.