Diablo 1 is great, though, and definitely worth a pop.
The classes aren't as restrained as in D2. Each class can do anything, so you could pick Sorceror and pump strength and use Melee weapons and shields. I used to play a Warrior with huge mana pools and all teh spells memorised. Obviously the Mana-per-point value for warrior is much lower than sorc, so you're at a disadvantage, but its still fun.
Plus, Tristram in D2 will make more sense once you've played D1. Particular in-jokes cross between the games too, such as Wirt dropping tons of gold in D2 as in D1 he would charge a fortune for stuff he sold.
If you have a netbook, or something, then play through D1. Grab the Sierra made expansion too.
Moo. i said Moo. Look.. i'm just a cow ok?
Christ. Any game where the best armour is called The Bovine Plate and is cow-coloured, complete with udders, is a winner in my book.