Would Twisted Fate
count as 'the first' for me?
Pretty much the biggest reason I started League of Legend when I did, is because I was watching someone's 'Top 15 League Champions' list, and they used scenes from the Twist of Fate cinematic between segments. I tend to like card themes, so I liked the guy's design.
I looked a little bit into it, and it turns out TF was on the free champion rotation on that particular week. So I thought "Well why not, it's a free game so if I decide I don't like it I can uninstall later".
And here I am now =|
As for other champions, I liked
Lulu because turning a rampaging enemy beast/warrior/demi-god into a cute little harmless fuzzy thing is more hilarious to me than it should be, even today. Honestly, if Whimsy was the only skill on her kit, I'd still try to play her for that reason alone.
Rumble, because he was rarely played, and his Heat mechanic meant, to me, that he would play differently than any other champion, which was the main thing I was looking for my first few months in playing League. I considered him my main champion for the longest time.
For a similar reason as above, permanent stealth meant she'd play differently. Although I very rarely played her in any PvP games (outside of ARAMs), so it was mostly playing against bots, but I did play her a ton with a group of friends I had at the time (Who i don't talk to as much anymore). Now that I think of it, I don't think I've ever tried jungling with her, only trying her mid (in the aforementioned bot games).
She was the next champion to be released when I started playing, she had a music video that built up tons of hype for her, I needed an ADC anyway, you do the math. Strangely enough, in the two Mystery Gifts I've ever used in my lifetime, BOTH of them have been Jinx skins. So I think RNJesus wants me to main a certain champions =|
I'll say this as many times as I need to, I have a weakness to cute, fuzzy things. And while some would find it a hinderance, I LOVE the semi-random transformation mechanic: I've said this a few times, but I like champions that have a mechanic that makes them play and approach fights in a different manner (Rumble needs to be careful with silencing himself, Evelynn can gank from angles that no other champion can, etc.), and Gnar's passive means that you have to be aware of your Rage, which decides the difference between "Stay back and kite" or "Go ham and break faces" and getting into position at the right time (Get closer to the enemy when Rage is getting full, for instance)
As a side note, I feel like I enjoy playing
more than I should for a champion who, admittedly, would be kind of be the poster child for a champion who just 'out-stats' you to death, since most of his kit is just improving his stats. I actually wish I could try the old classic champion, but unless I get lucky with a mystery gift (The only way you can get Traditional Trundle now), that's probably not going to happen.