Yeah I like them, they make good shooting targets. And Mr. Edward Sallow also know as Caesar is a pretty good NPC to fill with C4 when you reach a decent level.
A bunch of tall, ripped men in skirts. What's not to like?
Got no love for the Legion other than it's fun to wipe out Cottonwood Cove and the fort.
Only reasons I can think of are:
(1.). Zero tolerance to raiders/ criminals
(2.). Security of their lands (from anyone else except the Legion)
(3.). The attraction of their lifestyle of self sufficiency, total discipline and military skill. As well as the macho badassness (if that's a word) of bringing a machete to a gunfight!
(4.). The enduring appeal of the Spartan culture. "This.... Is..... Caesar's Legion!"