My favourite episode is probably Meat the Veals, just find it really funny and love how they all interact with Franklin. When Michael is leaving the house you hear a one sided conversation on the phone: "Hey, no, no I don't want to.... hey Franklin."
For Igor and those who didn't notice it on their first 5 or 6 watches:
At the start of the episode "The Sword of Destiny" we're introduced to Michael's doctor as Dr Stein. Then, right at the end in the "Next time" scene where he swaps GOBs fingers around a colleague refers to him as Frank.
are the four suits in pretty much all card games. The diamonds connect those family members that are related, except for Lindsay, who's a club - and as we find out right at the end of the show, she isn't related to the rest of the family. (Although I think this is probably a stretch, as Maeby and Lindsay are still related, but neither of them to the larger Bluth clan, and Tobias isn't a Bluth by blood either.)