I went through a few versions of my trainer card before settling on probably the cheesiest option smh. I really wanted one of the Hoenn triathlete avatars, since I'm big into that, but settled for the swimmer. I liked the water type background as well, but the fire felt like it matched my pokemon a bit better (even if it only adds to the ham). Hoenn is my favorite region, with Sinnoh a close second, so I decided to roll with the Hoenn badge set. I think it would be much more enjoyable to live there anyway.
Tyranitar: My favorite pokemon, he's a monster in game and consistently has been in competitive. My first bred 6IV and shiny as well. Easy choice.
Charizard: Basic af choice, but regardless of his overrepresentation in recent games, charizard is still a classic and one of my favs. Was in my first pack of pokemon cards waaaay back in the day (Blaine's charizard). Somehow I've never had him as my starter in a Kanto playthrough, but I have put countless hours into 99 floor dungeons on Red Rescue Team with him.
Sceptile: My first in-game starter and second favorite pokemon behind tyranitar. Placed him third because two green pokemon next to each other just wasn't a look. I've played through Sapphire, Emerald, and Alpha Sapphire with him at least 20-30 times combined. Also my first level 100 pokemon!
Infernape: Another starter- such variety! My favorite starter of my favorite game (platinum) has a special place in my heart. I love his design, his movepool, stats, prowess in the Sinnoh region, and really everything about him.
Milotic: These last two spots were much more of a toss up, I wanted at least one water type and Milotic is my fav water type pokemon (besides spheal, but he doesn't really fit my card thematically). Throwback to the arduous process of getting a milotic in gen 3. It's been included on almost all my doubles teams.
Garchomp: I used to really hate garchomp, but I've really come to appreciate it over the last few years. It was my go to pokemon for gen 6 EV training (hundreds and hundreds of hours) and a staple on nearly all of my competitive teams since DPP. Others in consideration that probably could be on this card any given week lol were dragonite, salamence, staraptor, skarmory, nidoking, gardevoir, scizor, azumarill, galvantula, gastrodon, talonflame, rayquaza, deoxys, kyogre, and speal due to their part in memorable teams in the past or just cause I like them.