I just can't get too interested in other emulators. The world of MAME is vast and could take years to explore fully. I dinked around with several of those other emulators first, then finally figured out what I really wanted was a MAME cabinet. So, if I was satisfied emulating consoles or home computers, I wouldn't have ended up here anyhow.
The other thing I have to say. . . Is that most of the consoles and home computer systems you can emulate are better played like the originals: sitting in front of a TV set with a gamepad in your hand (for console games) or in front of a keyboard and monitor with an Atari joystick (for computer games). Putting them onto a MAME cabinet, to me, wouldn't seem like an improvement at all.