i typically always catch the other two elements of what i didn't choose (in this case, water/fire), and afterward just catch what looks interesting or cute and isn't a normal-type (and can use the good HMs).
i'm no expert at this game, so i don't really know any good strategies or ways to play it lol
current team (guessing the levels):
Servine (33), Zoroark (32) Lucario (30) Azumarill (31), Arcanine (32), Genesect (31)
i just got out of the electric cave place, the fly-type gym is near but i know i need to level these guys up badly. i find it rather hard to train six at once. i always have favoritism tendencies in this game, always trying to keep my starter on top of the "pack"
i wish i had my dragonair and luxray lol