My absolute favorite is either the AK or the Famas, I can't really decide between them. The Famas is easier to use (especially with it's burst fire option), but if aimed right, the AK is much better and can do 1-shot-kills. When I play, I usually either buy the AK (if I'm T) or buy the Famas and discard it later for an AK (if I'm a CT).
As for the Scout (and the AWP, too - I'm playing quite a lot of vanilla CS:S as well): I quite like them, but I still need quite some practice. On the
TG server, the Scout is absolutely awesome (as it's still the lightest weapon in the game but can do 1-hit-kills), but I rarely use it as it's restricted to one per team and I don't want to gimp my team by taking it away from somebody more skilled; on other servers I often play a few rounds with it, doing some practice, and then jump back to using the Famas/AK after I get killed a couple of times.
As for pistols, I usually go for the Deagle (as it has the highest damage potential) or, if I want to mess around a bit, the P228 (which IMO is inferior to the Deagle, but a nice weapon nonetheless). If I know that I'm going to do a lot of CQB, I occasioanlly take the Auto-Shotgun (the Pump Shotgun is just an oversized, overpriced, slow-firing Deagle, meh) or the SAW (suppressing fire <3).
