Like most here, the Vic was my first computer and so will always have a place in my heart for that reason alone but there is more to it than just simple nostalgia...
I was lucky as when I got my Vic my friends each had different machines so it was easy to compare (though, of course, there was always justification for your favoured machines foibles!).
So, through my friends, I had access to a Speccy, Atari 800 XL, C64, Amstrad CPC464, TI 99/4A, Acorn Electron and the Beeb amongst others.
I used to slagged a lot because my computer was the weakest out of them all but you know what? It loaded games faster than all of the above, the Datasette format was more reliable at saving my programs than all of the above except the C64 but that thing cost a fortune at the time. The 800 XL was nice but getting games for it was easier said than done and most of the games had better soundtracks on the C64 anyway! Although my Vic didn't have hardware sprites it didn't have the God-awful colour clash of the Speccy and though I had to play games through the telly it wasn't ties to a monitor (and built-in tape deck) of the Amstrad! The Beeb was for academic things and the Electron was a nice wee machine but it lacked the friendliness of the Vic and, again, lacked games... the less said about the TI, the better!
In short my Vic was cheap, cheerful, accessible, had tons of cheap games, loaded quickly for a tape-based machine and was easy to program. Why wouldn't I love it!