2 is the golden number for me. Suikoden 2, Breath of fire 2, sonic the hedgehog 2, Super Mario brothers 2 (NES), Super Mario World 2 (SNES era), Star Fox 64 (after Star Fox SNES), Tales of Destiny 2, Golden Axe 2, Shining Force 2, Illusion of Gaia (2nd in soul blazer trilogy), Sacred Stones (My 2nd FE after Radiant Dawn, and also the 2nd localized FE), Earthbound (2nd in mother series, even though I played Mother 1 2nd), Zone of Enders 2nd Runner, Metal Gear Solid 2, and possibly more.
One thought I had a long time ago about trilogies (in movies or games, etc) in like college or something was like, in art, 1 is the creative get everything started hard work to get a good result, 3 is the get serious have to make a final statement, and 2 is just a party in between.
I like the parties, not that I always play in order but often I end up doing that.
Super Mario RPG is an exception I guess, but that's because I think Paper Mario was so not a true sequel in content.