I just replaced the hydraulic clutch system in my pickup truck a week or two ago (1999 Dodge Dakota). Pressure plate, throw-out bearing, and clutch pad were all good, but the master and/or slave cylinder started leaking internally so although it didn't lose fluid, it wouldn't completely disengage the clutch when the pedal was depressed so sometimes it was impossible to get it into gear without shutting the engine off. $160 and an hour later I had the part installed myself. Not a complicated repair, but I just bought the pre-filled pre-bled kit with both cylinders and a fluid reservoir and just replaced the whole thing so I wouldn't have to worry about trying to figure out which cylinder went bad, bleeding the whole system, etc. Good thing is that the factory cylinders were plastic, but the replacements are cast aluminum with more rigid hydraulic hoses (Feel like they have a metal liner inside the rubber).
The master cylinder was the hardest part because I had to unbolt the vacuum chamber for my brakes, which required a few extensions and swivel sockets to get to the bolts, and slide it forward a few inches so I could wiggle the master cylinder into where it needed to be, then re-bolt it all back in place.
Having owned both a manual and an automatic, personally, I prefer a manual.
OMG now I wish I knew you about 8 years ago when I had my Misti Galant, a not correctly calibrated Thrust Bearing kept destroying my clutch plates, (at the time I didn't know this) Scrapped the Car, and have missed it ever sinse