I've been in Infantry, Transportation, medical, artillery, engineers and CBRN.
Infantry is the most macho and fun job for a young man.
I think its a great starter MOS.
later you can always transfer but the infantry is where the heart of the Army is.
For some folks it might get boring after a couple years but you will pick up some great survival skills.
Engineers is also very huah, basically infantry with explosives.
CBRN is usually quite boring while your in (unless your get tech Escort!) BUT the CBRN school these days graduates you as a certified MAZMAT Tech, which is very cool for afterwards.
Artillery does the most killing in a real peer on peer engagement, but we havent done that in a while and as a result artillery has atrophied a bit.
If I where to do it again I would probaly go Infantry because then I am on track for going to all the cool patch-producing schools, or Combat Engineers which is a little more varied.
Armor also seems like it would be tons of fun but I have not been in it.
or if you are sharp become a Medic and if you compete successfully they will then send you to PA school (physicsians assistant) after a couple of years as a successful medic.
PA , means real money on the outside and it will even get u commissioned as well.
As for future jobs Signals and Transportation are generally good as well.
So many choices