I started with S1, and the 1st time I went online I was overwhelmed
so many tracks, so many cars, and the tracks seemed so long to memorize. So much fun
. 1st Tracks I've tried were South-City tracks and Fern Bay. And they were so different from the demo...
Then I started playing more and more with the MRT5 because I found it the most fun for me. The LX cars were a bit much for me in those days, and in S1 they were even harder than they are now. Then I bought a wheel (MS SideWinder FF USB, Still using it now) which upgraded the whole experience and made the LX cars more controllable (been driving with a mouse till then).
And.. When S2 came out I liked the Fox, FO8 and FZR, which are still my favorites. and only later started playing with the slower cars. But all are of them fun, even UF1000 on the Oval
cheers,
avih