Interresting thread
Back in the time I owned an Amiga and a SNES at the same time (I sold the SNES and not the Amiga ^^)
The Amiga library is not around 4000 games but 13 000 games :
http://obligement.free.fr/listejeuxamiga/listejeuxamiga-stats.php
Comparing the Amiga to a NES or a MS made me laugh. I do not know which games you tried but I think that it was not the most selling ones. Please note that an Amiga can emulate a NES and a Master system...
Many Arcade games were ported recently to Amiga and here is an example (not really a NES, hum ?)
Here is castlevania on NES :
Here is castlevania coming to Amiga AGA :
Remember that the technolgy inside the Amiga is from 1985. Give me the name of a console or a computer in that era that can do what an Amiga did back then ? The Atari st, Macs, PC's, console where all left behind, for games and for the operating system.
Please note that music in a game was almost 50% of the experience of a given game, Paula's chip was only beaten by PC/Amiga sound cards and CD based console/computers. Even Megadrive and SNES where bad compared to Paula except in few games.
Now we compare a stock Amiga in this thread with a Magadrive or a SNES. If your goal is to prove that MD and SNES where better in terms of graphics, then you are right. There were design for games and nothing else (on Amiga you can play and creater music, do office work, paint, 3D animation...).
Now if you take an Expanded Amiga with accelerators, RTG cards, sound cards... it will not be the same results as it can play games such as Wipeout 2097, QUAKE 1 and 2, Descent, Diablo and many others that a SNES and a MD will never play.
Game companies remain focused on the A500 compatibility until the end of the Amiga, the AGA chipset found on A1200/A4000/CD32 was left behind.
About controls, they were just good. A joystick and a keyboard full of keys. Except if you plugged in a keyboard in your Wii, you missed some precious controls (i.e. Alien Breed 2). Now with WHDLOAD, many keyboards keys can be mapped to a controller. SNES controller type can be used on Amiga, all its buttons can be mapped. You can play Flashback just like you would do on a SNES or MD.
Here are some games that I will never play on any other platforms because TO ME they are better on the Amiga (or exclusives) :
ZOOL CD32 (yes I prefer Zool CD32 than the MD one
), Zool 2 (not on MD ?), Alien breed trilogy, Agony, Apydia, Project X, Another world, Arabian Nights, Athanor 2, Battle chess, Populous 1 and 2, Lemmigs trilogy, Blood Money, Globdule, Super Frog, Black Viper AGA, Banshee, Brian the Lion AGA, 4D sport Driving, Pang, Benefactor, Bills Tomato, Lotus Trilogy, Jaguar XJ220, Cadaver, Cannon fodder, Sensible world of soccer, Kick OFF 1 and 2, Defender of the crown, Flashback, Heart of the Alien, Escapee, Hired Guns, IK+, James Pond 2, Inviyya, Jurassic Park, Gods, Gloom (Deluxe), Lion Heart, Hybris, Leander, SWIV, Menace, Nebulus 1 and 2, Noth and South, Odyssey, PanzaKickBoxing, Nicky Boom, Pinball fantasies, Wings, Rick Dangerous 1 and 2, RuffNTumble, sleep Walker, Shuffle Puck Cafe, Silkworm, speedball 2, Super cars 1/2 and AGA, soccer kid, breathless, and many more... And of course all point and click games.