I love all the standard maps, except 2fort
I don't get the 2fort hate.
I love 2fort.... It's one of the few maps that requires a great deal of teamwork by the whole team. Also the map has a nice mix of wide open areas, multiple access points and chokepoints. You always know WHERE the SG's are, but it's almost impossible to take them out yourself.
Each and every class can really shine through on 2fort, something unseen on the other maps
Most people hate 2fort, because of the chokepoints with SG's. It's faster to build and upgrade an SG than it is to run through the base, which means that you will have to destroy all SG's in every attempt you make on taking the intel. However, there are several combo's that can ensure a quick takedown of the SG's:
2 Soldiers: Rocketjump to the roof, Shoot one rocket on the SG that is outside the enemy spawn. Quickly hide again behind the corner, then go out and take another shot. Since you are attacking from behind the sentry gun, it will take nearly a second for it to turn around, and another half a second for it to start shooting. This CAN be done with one soldier, but you have to be lucky with crits.
1 Demoman, 1 Medic: Self-explaining. Übercharge, throw 3 stickies on each sentry, blow them up. Demoman can in many cases also sticky up the SG from a blind angle, meaning the SG can't return fire.
1 Spy, 1 Pyro: Pyro gets in as close to the SG, he can get, and as soon as the spy saps the SG, the pyro runs out, and burn both the Engi and the SG. Spy just keep sapping the SG. SG should die in a matter of seconds.
Almost all attempts on taking on SG's (except a demo shooting from a blind angle), requires at least two people, and good coordination over voicechat.