Hanabi
We played on 4th of November, so Hanabi was very appropriate. It's a cooperative game involving a group of firework manufacturers putting on a display.
This works by each player having a hand of five cards, but players never see their own hands. All the other players do, and this is how they can give hints. The cards are one of five colours (white, red, blue, yellow and green) and one of five numbers. The fireworks must be built up in numerical order, and there can only be one of each colour.
On their turn, players can give a hint to another player by telling them which of their cards are a particular colour or number, or discard one of their own cards, or play one of their cards. The number of hints are limited, but can be bought back by discarding, and playing a wrong card brings the storm closer.
We played a couple of games, scoring 14 the first time, and 18 the second, out of a maximum of 25.
Endgame, apparently this score is 'Excellent; the crowd are delighted'
A great fun game, with a straight forward mechanic, but requiring a good bit of thought (and, apparently, a better short term memory than I possess).
Definitely A tier.
Sushi Go
A fast, fun card game where the object is to build a meal over three rounds, making sure you have enough puddings at the end of course.
We've played Sushi Go quite a few times now, and it's a good one to have handy to fill in ten to twenty minutes at the end of an evening.
This was my first experience of 'pick and pass', where the players swap hands each turn. Thus you know what each hand is after a while, and strategies can be built around denying players cards that might benefit them.
Some dishes are worth points on their own, some are worth more in combinations, and some require other cards.
Puddings are played through all three rounds, but are only applied at the very end, gaining or loosing points for having most or least puddings.
While I don't like Sushi, I really enjoy this game. Part of this is the speed of play, there always seems to be time to squeeze in a quick game. Partly for this reason it earns a solid A.
Two good A tier games*. Hanabi is great for getting the mind working. Sushi Go for a quick game.
Both games are available from various online retailers, and at least one chain of UK booksellers stocks Shushi Go.
*Don't let that put you off, both are very highly recommended, but they don't quite provide the gaming experience that I get from, say, Moon.