There was a lot I liked about System 7, but I always hated how Mac OS handled multitasking. And Mac OS 8 IMO was a massive improvement aesthetically. Back in the day when OS 8 was stuck in development hell, I was a diehard Aaron user just because I liked the look and feel so much.
Windows 95's taskbar was a godsend. It was IMO the first GUI approach to multitasking that worked, and on top of that you had Alt-Tab which was the icing on the cake. Mac OS tried to emulate that with Command-Tab, but it never worked as well as on Windows (IMO the only desktop to ever improve on Windows Alt-Tab was KDE, especially when they switched to vertical layout in 3.3 or so).
Now, if you started talking about merging the Win95 multitasking UI with the rest of the System 7 GUI and Mac OS 8's theme, you've got my ear.