Opinions will differ, but generally people really like the first and/or third. The second was rushed, and it shows, mostly by a ton of reused assets and locations.

The first is more loved by hardcore or oldschool RPG fans. The third is more action oriented, generally a lot more colourful, and very much larger. Its combat is generally liked more than the first (except, again, by CRPG fans).

All three have memorable characters.