All of them are cool. I really like Maylene as well, but none of them can compare to my Whitney. She's the cutest, the funniest, and one of the toughest fights in the games. I love her and she's my favorite character of all times. Not just in Pokémon. As cool as everyone else is, there's no contest. It will always be Whitney for me ~ <3
I'm actually kind of embarassed to admit that I like Arti/Burgh more than the others. XD Though I liked more how he was portrayed in the original games and in the Spanish translation (Camus? Yes please!). And he uses Bugs, which recently became one of my favourite types. Plus, he became hilarious to me when I heard the gossip in the National Gymquirer. XDDDDD
If Platinum was the version considered for these polls, Melissa/Fantina would have won, but nope. Also, Tessen/Wattson is second, but by far.
It's either Maylene or Whitney. Whitney was never that hard for me; I just used an Onix to muscle through the battle. I guess I'd have to go with Maylene, though. It was pretty cool to face Lucario for the first time.
This is a tough one, the third gym tends to be pretty memorable...
Lt. Surge was interesting and had plenty of charisma. But... I guess his character didn't get much in terms of plot and stuff.
Whitney is hands down one of the most memorable Gym Leaders. If not THE most memorable Gym Leader (not counting the general public who only got past Brock anyways). That Miltank of doom and overall how she is basically That One Boss makes her to my eyes like Airman in Megaman.
Wattson. Wattson was my personal That One Boss. I learned the fear of stats, levels, and such from him. Having your entire party destroyed by an unavoidable move makes you stop relying on luck and sweeping ever again and to start thinking better. He also shows up later in the game, and I like his characterization. It even kinda fit how he taught me such a lesson the hard way.
Maylenne wasn't that interesting to me. As for Burgh... he is quite the opposite of Surge in that he got a plot coupon. He is also pretty charismatic too. (however he is found right after Aloe, who is basically awesome and unforgettable)
But anyways, I'll say Wattson, out of personal experience.
Well let's see. Whitney is a brat who is only training pokemon because it was the popular thing to do.
Wattson is meh.
Maylene is pretty cool and uses one of my favorite types... but I have this "ew feet" thing and her vs sprite makes me squeemish. >_>
Burgh also uses one of my favorite types and has an awesome gym and is an artist but...
I am horribly shallow. Lt Surge got a sudden sexy makeover in HGSS so he wins. : D He also also the owner of THE original puzzle gym and it made me want to punch him. They only became more innovative from there but at least his wasn't the same answer every time.