Everyone is different, from my perspective I'm a new hire from the AF and one thing that really caught me by surprise during the transition is the amount of additional commercial flying considerations versus my preconceived notions of what it was going to be like. Obviously it's nothing too cosmic, but depending on your background it could be very different expereience than taxiing out of any quiet AFB and going to the MOA or quiet Class C/D fields for pilot pro with a more accelerated training timeline. Maybe you'll be a faster learner than me, but you will get far more reps and far more experience flying NB's versus sitting reserve on the triple or 78 forever, being the bunkie and getting maybe 30 takeoffs and landings per year.

The 2 big threats would be hanging out in WB's for a year or two, getting very little actual experience, then going to the left seat in the bus or 73 and struggling during upgrade, and the second is all the advice I've gotten is commuting to sit reserve is miserable. I'm rapidly learning it's not the time spent traveling or how deep your spotify playlist is, it's the part where you have no idea if you'll pick up a trip to a freezing cold or tropical destination, or when you'll get home, or if you're going to make it back to your home airport where you left your car, when you'll fly, all while paying out of pocket for hotels or crash pads and praying for an open seat on the ride to or from home. There's the "responsible commuter" policy, but there's also probation with minimal union support and a vague threat about reliability ratings. With all the cancellations these days it's very easy for a flight to go from half empty to overbooked if one flight gets cancelled. And if your reserve schedule has 2 days off in between reserve blocks, there's a real chance that you'll be flying home on your first day off and flying back to EWR to sit reserve on the second day. I'm still in the reserves so I'm managing my mental health by being able to take short bits of mil leave, but some of my retired friends don't have that luxury and they ended up moving to base sooner. You very well could be different though, it's not a one size fits all thing. And I will happily remind myself when I'm sitting standby that at least I'm not writing OPR's or doing PME or fighting finance to get my DTS voucher approved, and hopefully that keeps me sane.

The consistent advice I've heard is
-commuting sucks, especially double commutes and especially going to reserve
-mil guys with no commercial or boeing experience should avoid 756's to minimize the amount of transition learning (ie learning United procedures, 121 ops, oceanic ops plus 4 different aircraft)
-you can always snag the 73 or bus at indoc and move up to widebodies if you decide commuting is feasible, but if you pick wide bodies in indoc, you're stuck in a seat lock for 2 years for better or for worse.
But the beauty of this gig is it's all a choose your own adventure story, and it comes with a fraction of the BS from big blue. If you want to go WB right out the gate then go then go for it!