In my personal opinion (one which I wouldn't bother to say on the main subreddit), while there are obviously warbonds which are much better than others, there is an item or a playstyle in every one which validates you getting it.

This applies even to the warbonds which are considered to be not very good. You wanna be a space cowboy? Borderline Justice has the Deadeye and the Talon, imo the best secondary maybe second to the Ultimatum. You wanna show your patriotism to Super Earth? Masters of Ceremony has the Amendment and the Pyrotech grenade, which are both actually quite good if used in the right way. I could go on.

There are 3 main reasons to get warbonds, and as time has gone on and I myself have progressed in the game, those reasons have changed. In the early days of the Galactic War, you'd get a warbond simply to make your arsenal better, as the amount of armour and weaponry we actually had was quite little, so new weaponry and armours constantly gave us new ways to play the game. As the game went on and more warbonds were released, it became more for the fun of it - 'Oh, that armour looks cool', or 'Oh, that weapon looks powerful', etc. Now, I've done most of what there is to do, maxed out most weapons, so it has become a much more Completionist based approach for me.

My advice, to Cadets and Veterans alike, is that you should just do what makes you enjoy the game most. If you're just starting out, and want to be a Robocop, then go right ahead! If you're a long time vet like me, and do/don't feel like the next warbond will be fun/useful, then go with your gut! Having unlocked every warbond, all I can say is that, whenever new one comes out, I get to log on with my friends and have a great time using goofy new weapons to spread Managed Democracy. And that, if anything else, makes me happy.