I thought I would start a best and worst RPGs thread - I didn't see anything like this when I searched but I am sure someone will whack me if this has been done to death before

To start things out, I personally think that D&D 3.5 is the best RPG that I have played.
Reasons I like it -
1) I like the d20 vs target number mechanic that is used. It is easy to use and understand.
2) I like the class system (but frankly this might just be my D&D roots showing through), the classes are broad enough to be interesting and able to be specialized through skills and feats.
3) I like the feat system to let general characters specialize.
4) I like the hp system, it keeps combat flowing and gives players feedback on how hurt they are.
5) I like the combat system in general - it uses the same mechanic and calculation as everything else.
Things that I am comfortable with but have to have an excuse to like
1) The magic system, I like it...but at the same time I am aware that the reason I like it is that it is the same as D&D's magic system has always been and thats why I like it.
2) The spell caster classes being weak at the start and powerful at the end...again this is just like D&D has always been so I am comfortable with it. I am also well aware that this has always been one of the areas that people who play other game systems dislike about D&D.
3) The hp system (yes I know I put it in twice), I am aware that it is a silly abstraction but it works and keeps play flowing. Every game I have tried with "more realistic" damage systems turned into an exercise in dice rolling tiny details every time damage happed. So while its a silly abstraction it works.
The worst RPG I have played?
Wow this is actually much harder there are so many...I guess I have to go with AD&D (aka first edition D&D).
Things to dislike
1) No skill rules at all unless you are a thief - then only skills for "thief" type skills. Plus the "skills" use a completely different mechanism than the rest of the game.
2) Combat rules, funny look up tables that are different for every class and did not have a steady progression at all. Different bonuses for different weapons to hit different kinds of armor (that did not actually fit with the real life logic of the weapon),
3) Get experience for finding lots of money and treasure.
4) Lots of rules for the cost of magic items, no rules for making magic items at all.
5) Lower armor classes are better with -10 being the best armor class in the game and 10 being the worst.
6) Huge numbers of rules 90% of which were crap.
7) Huge numbers of inconsistent add-on products (from the same company) that contradicted themselves at every turn.

9) All characters of a specific class have exactly the same skills at exactly the same level.
10) Max level for non-human races.
11) Classes that are denied non-human races
12) Minimum stats to qualify for a class - if you had a wisdom of below 10 you were restricted to thief...
13) difference between multi-classing (advancing in two classes, only non-humans and only in some classes/combinations that have to be picked at character creation) and dual-classing (taking a second class after character creation, only humans, only allowed to advance in one class at a time, can't use the lower level class or you don't get experience for the whole adventure) [I can't believe I remembered that - what a waste of memory space

14) isn't that enough?