I definitely do, you and I think alike. I might stick with 3 teams, but I might as well make another one. I don't want my Infernape go to waste or my Mismagius. I just need to get that Wireless Router or whatever to communicate with other people.
Sure, my single team: Typhlosion, Salamence, Roserade, Floatzel, Lucario, and Raikou. I plan on migrating. Double Team: Blaziken, Garchomp, Weavile, Gyarados, Jolteon, and Azelf. I hope you don't mind battling Raikou. I plan on making an eevee team. Some things may change.
Yeah, I really love Sceptile. Leafeon, Roserade, and Breloom are great too. A lot of grass pokemon suck big time. In platinum, I hope they let Bebe gives the player an Eevee when he/she first arrives to Hearthome City instead of after beating E4. I just think that it can fill up a slot on your team. Some people have been winding up with the same teams.
I am pretty good with fire types. There are some Water types that I am good with: Gyarados, Vaporeon, Starmie, Feraligatr, Swampert, Kingdra, Golduck, and Floatzel. Well for grass types, not much. I use Sceptile, Roserade, Leafeon, and Breloom a lot. It is a shame Torterra is very slow.
When I get platinum, I will probably start with Chimchar anyway because I am a fire lover. There are not that many fire types out there. There are plenty of other water pokemon for me to choose. When I started out with Piplup one time, I had so much trouble with it.