Strongly recommended and vaguely in order of preference:
Sopranos
band of brothers
firefly
buffy
west wing
battelstar galactica (just starting to plough my way thru now, pretty good)
lowering the bar a bit:
24 (first couple of seasons very good but then gets silly)
lost (1st season good other than too little happens, 2nd dire, 3rd it really gets going)
Heroes
Alias
CSI (vegas/original)
Curb Your Enthusiasm (constantly fluctuates between hilarious and just painful)
4400
Not sure if the following are worth renting but I look these out if I'm watching the TV:
House
Scrubs
My Name is Earl
First season of Nip/Tuck was very promising but I lost all interest in the second season.
I have Arrested Development and Dexter outstanding on my rental list, adding How I Met Your Mother now
Sopranos
band of brothers
firefly
buffy
west wing
battelstar galactica (just starting to plough my way thru now, pretty good)
lowering the bar a bit:
24 (first couple of seasons very good but then gets silly)
lost (1st season good other than too little happens, 2nd dire, 3rd it really gets going)
Heroes
Alias
CSI (vegas/original)
Curb Your Enthusiasm (constantly fluctuates between hilarious and just painful)
4400
Not sure if the following are worth renting but I look these out if I'm watching the TV:
House
Scrubs
My Name is Earl
First season of Nip/Tuck was very promising but I lost all interest in the second season.
I have Arrested Development and Dexter outstanding on my rental list, adding How I Met Your Mother now
