Im going to have to go with RPGs
Ill split this into to sections crpgs and ...crpgs? Well console rpgs.
CRPGS
pros - With many crpgs there are numerous ways to customize your character, Fallout, Morrowind, Baldurs Gate, etc... Sidequests that are meaningful and rewarding, not fed-ex missions. Varied weaponry and attacks. A lack of a leveling 'grind' (a'la everquest and WoW, or the majority of console rpgs.)
cons - Graphics over gameplay!!! This is the major killing point for me in many of todays crpgs. Oblivion is one of the biggest here. Oblivion also suffers from a dumbing down for the general gaming audience. This is also a great downfal for crpgs.
http://www.rpgcodex.com/content.php?id=129 .
Console RPGs
pros - With many console rpgs hailing from japan we get a very different style and story than we find in crpgs. Art, gameplay, story, mechanics are wildly different than any crpg. Here story and art is focused on making many into interactive storybooks. Just take a look at some console rpgs like Xenogears, Final Fantasy, or Breath of Fire, Suikoden! Mini-games! Fishing in Breath of Fire III is fun, addictive, and..well..fun! Or simple dice games like chinchirorin from Suikoden. Unique battle systems like the martial arts combo system and gear combat systems found in xenogears.
cons - Repitition! Level grinding! Little to no customization of character. In some console rpgs you find yourself suffering through the random battles to get more story. See games such as final fantasy VIII or I hate to say it, to an extent even the later final fantasy titles. Many console rpgs utilize a basic combat system copied from standard final fantasy combat. This can lead to unexciting combat and lots of boredom.
Best Crpg imho - Baldurs Gate 2
Best Console RPG imho - Xenogears / Suikoden II / Final Fantasy VII