I never finished Xenogears either. But if a mech RPG is what you're looking for I can't think of a game that gets more praise than Xenogears. Theres also the Front Mission series but I've never played any of them.
I'd been playing the first Front Mission last year. The game is turn based strategy on a grid. Your wanzers have a short range and long range attack. Short range tends to do more damage, long range tends to do less damage. Hit rates vary. Each hit applies to a part of the wanzer - left arm, right arm, legs, body, etc. You shoot down each part of the other wanzer piece by piece, so as a wanzer loses an arm with a gun, they can't use that weapon, when they lose their legs, they can't move as far, etc... The setting if I recall is post-apocalypse cyberpunk.
The
ONE thing that made it painful to play consecutively is the
micromanagement. As you go thru the game, you get more and more characters - I'm at around 10 or so, maybe more, if I recall. And then after each battle, each between battle city has a shop that seems to have more powerful armor and weapons available than the last city. So you go and upgrade each wanzer . Only thing is that as you play, each vehicle will be specialised for a particular tactic. And each wanzer has a item to change for body, CPU, right arm, right shoulder, left arm, left shoulder, legs, backpack. And in later stages I swear you have like 30+ options to choose from for each type. BUT... you can't just purchase the items with the highest stats for each character. No no no... if it were that simple, management would be not as intense as it is. You have to consider the WEIGHT of each item to equip as if it can't go over a certain weight. Going thru the shops to upgrade my characters one by one took me over 1 hour of actual time last time I played. (I happened to notice the clock and seeing I was still upgrading my characters' equipments an hour later thought -
this is ridiculous...) Taking close to an hour in the shop upgrading my character's equipment between battles got annoying - realising I would have to do it after almost every battle. The AI is smart enough, that yes you DO need to have the strongest available equipment for each battle.
I'm usually a big fan of the slow-paced repetition that puts me to sleep genre, but this game takes too much thinking tinkering with the wanzer customization. You can even name your wanzers and paint them custom colors, etc if you like. Very cool, but the equipment management overwhelms me... The battles are very fun though.