I like that:

I can last hit in lane (every 8 seconds at least).

I can do burst damage (especially early).

I can heal in lane.

I can chase.

I can save my carry from across the map.

I can 1v1 a melee DPS'er (even late game).

I can jungle.

I can forget about clarity runes and forcing a chalice every game.

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On the other hand:

I wish I could initiate.

I wish I had natural slow or stun.

I wish I could reposition an enemy.

I hope Amumu doesn't counter me by playing.

I hope that enemies don't buy Madred's.

I wish teammates would read what my R does.

I wish I could sense stealth (fake ninja) units (would make Q so much better).

I wish CDR worked on my passive (reduce the 8 second timer).

yeah, this champ is a bit meh, he's a high hp champ that can get bursted quickly unless you stack some armor or mr after...

If Alistar had the same hp, he'd be a monster.

edit: typos

You can. AoE taunt greatly reduces potential incoming damage. After that, it's up to your team.

Me too.

It might not be Headbutt, but you do that with Shadow Dash.

Amumu's not really that good against Shen. It's like saying he counters Cho'gath (he doesn't). Nasus is a different story, though.

Get MR. Anybody who gets Madred's Bloodrazor won't have M. Pen, so you can cut the damage by half with base MR and an item. Are you really afraid of an extra 80 damage per hit (at 4k hp)? I'd be more worried about Infinity Edge.

That will come with time.

Agreed. That bigdownload news page showcasing the champion states

Maybe what they meant is the sword over the target, but still, I was hoping for a reveal.

Madred's Bloodrazor will do 160 damage to you at 4k health. And with a Yi beating on you, that can hurt.

It does magic damage, so you can get MR to counter that. All tanks have that problem, although Alistar and Rammus can counter it with Unbreakable Will and Defensive Ball Curl.

Frankly, Bloodrazor is the least you have to worry about when fighting a Yi. Seriously, unless that was the first item he got, he should be doing at least double that with his frequent crits.

I don't see why mention Bloodrazor given how HP focused tanks aren't anything new. When playing Cho, Bloodrazor is not something I worry about. Getting crit by 800 is something I worry about.