I've got tamer characters in various stages of completion on quite a few shards now, so at least every other day I work my way down the list of all of them that still need taming gains and go out and tame stuff with them until they get at least one gain. The tamers that I started with 50 taming skill instead of using an advanced character token usually get daily attention of an hour or maybe two until their taming skill hits the low 90s.
While I'm running around in Destard on the better tamers looking for drakes and dragons to tame, I often lore the greater dragons in hopes of finding one that is better than what I have. If I find one that's worth the trouble, then I'll go ahead and tame it. Occasionally I'll also get the urge to see if I can find a colored greater hiryu with decent resists, stats and skills. Most of my tamers are human, so I rarely tame cu sidhe. Plus I'm just not all that enamored with those little buggers. Something to do with all that barking they do, I guess.
If my tamer on the shard has the skills for it, I'm happy to tame blue beetles, fire beetles, and swamp dragons for folks. I don't think I've ever charged anyone for them either, especially the fire beetles, because I know how desperate I've been to get them when I've started out on a shard. I have accepted a small amount of gold for them when someone really presses me to take it and it felt rude to turn them down. I also enjoy helping out with peacing the mobs when I see someone else who seems to be having a little too much of a challenge taming a pet.
So far I haven't gotten into training up pets to turn around and sell them. Have thought about doing it a few times, but I've got so darn many of my own pets to sell I think I'd just end up feeling guilty about neglecting my own. I also don't really care to train pets on shadow elementals, so I tend to take way longer than a lot of other tamers to get my pets up to speed. I Nothing wrong with training them that way if you can handle the boredom. I prefer to hunt stuff, get gold and fill up my house with about a gazillion enhanceable pieces of armor and weapons and jewelry I'll probably never use. ROFL (Gives me something else to do later and once in a blue moon I actually find someone that can use it or is too polite to turn me down when I try to pawn it off on them. Haha.)