Sure why not?
Gen 1 Starter: Pikachu/Bulbasaur. I always felt the need to choose the starter on the box too. For me it was leafgreen. Gen 3: Mudkip. Personal mascot I'd call my Pikachu. Gen 4: Piplup. It was fun thats it. Gen 5: Tepig This one just felt right. -Fun fact. Whenever I play a main series game I never let any of my pokemon evolve unless they learn a new move like tepig when it gets arm thrust as pignite. My only exception was mudkip after I saved and saw the evolution marshtomp. I didn't like the look so I played through Saphire with a level 51 mudkip and entered the hall of fame with it along with a team of course. In pokemon Black I had pignite as my only evolved pokemon with blitzle, pidove, pansage, timburr, munna and sometimes whirlipede. I will say that made battling Nimbasa's electric gym leader difficult enough for me to lose at least once.
-I take forever to make decisions even with starters. Since there isn't one on the covers of black and white I was sitting there for like five minutes trying to decide which pokemon seemed to fit my idea of a "hero's partner". In the end, I felt that tepig had the right look.
-Generally I train and test out any pokemon that looks appealing with some consideration of the level to me(stunfisk no thanks). In Black I trained a lot of pokemon in preparation for each gym leader but I of course ended up rushing through the later half of the game.
-I tend to build my teams artistically with as much variety in size, color and type as possibly. So for emerald I'd have a Blaziken but I would throw in a Glalie because of its bright blue colors in contrast. Then I'd bring in Tropius and Aggron due to there potentially large sizes and I'd top it off with a Minu because of its small size, dark blue markings and overall yellow look. It gets annoying in Pokemon Black where I add too many standards like everything needing to be dual typed, different in type, and from Unova only but it looks nice when its done.
-In diamond I sometimes saved before leaving a zone where I'm partnering with another trainer like the girl who had Chansey. I don't know I just start to miss having humans in my party for an RPG.
-I never ev train unless I get completely obsessed over trying out a new pokemon combo or two. Even now if I do that I aim for perfect or close to perfect IV's unlike my younger self who learned ev training first then ev trained a Flygon in Special Attack, Defense, Special Defense, Hp, and Speed only to find out that all of its IV's were below average as well as having an Adamant nature. After 7 years I can say I beat Orre Colosseum of XD Gale of Darkness and won't do it again.
-I'm getting into the Fairy type pokemon and my favorite so far is Aromatisse though I've always loved Gardevoir as my psychic type and smart/beauty contest winner in Saphire.
-I don't like grinding because it feels mindless and I can easily get trapped into doing it sometimes but I prefer training wherever my pokemon level up the fastest.
-There was a point in time where I continuously harvested berries all the time for both Sapphire and Diamond but once I stop, I stop completely.
-I loved battle frontier when I started it. Hated it before I gave it up. I tried but I never liked the idea of starting all over and battling random trainers who didn't really have anything interesting to say in ALL CAPS. I enjoyed and played my hardest at the Battle Dome, Battle Factory, and the Battle Pike. The Dome is where I went all out planning my team before entering and after not to mention I felt that it should have been implemented as the pokemon league but that's just my preference. The other's I couldn't do so much and the Battle Palace I won't even give the time of day after my first try even with a guide.
-I hate to delete moves so I tend to take about five minutes deciding on what I want to keep usually mid-game.
-I don't like naming my pokemon but when I do it means that I really don't wanna stop using it.
-Last thing, whenever I choose pokemon in my team I consider a possible story it might tell about my character in relation to the other main characters such as in Black. If I could see a story behind my trainer using stunfisk I'd use it right away.