I'm gonna be playing Dragon of Icespire Peak soon, and I have three characters I can use that I cannot for the life of me decide which to use.

Number one: Selnan Merk, CG Goblin rogue (soulknife) who endeavors to become the king of all thieves so as to institute honorable crime across the sword coast. he was cast out by the Cragmaw clan for his ideology of honorable crime such as stealing from the rich and being loyal to one another. The Cragmaws also feared his ancestral connection to the unseelie courts of the feywild, as made evident by his black and gold eyes, pallid gray skin, and shock white hair. Napoleon complex, very dramatic and over the top when he wants your attention.

Number two: Lysandre Diamond, LN Drow Sorcerer (clockwork soul) who, after losing his family and temple to a hobgoblin raid, sought for meaning in the grand equation of Mechanus, seeing as his lost temple worshipped Primus. in his studies he discovered a portal to Mechanus, and was enraptured by the beautiful symmetry and infinite efficiency of the plane- before the portal collapsed on top of him, giving him his power. Now he strives to find a way to bring peace and order to the material plane- by any means necessary. Clean cut, orderly, and ruthless.

Number Three: Nevalo Spinel, CN green dragonborn warlock (fiend patron) who really leans into the green dragon manipulator trope. After hatching alone in an alley, Nevalo grew up making an extraordinary effort to achieve high status to spite his absentee mother, and abnormally small size. Making a pact with a shadowy entity, they plan on climbing the ladder even higher than most mortals would dare try to achieve. He plans to enact his patron's will long enough to gain their trust, before turning the tables and manipulating the situation to gain the upper hand. Fashionable, egotisical, and ever so slightly flirty.

Greetings Gaberielstickslapper,

Choosing a character is a pretty personal choice, so I would have to say, pick the character that seems like it will be the most fun for you to play.
I don't think anyone other than you can make that choice :)

Cheers!

Definitely not the goblin. Stealing-type characters can be pretty annoying (source: there's one in my campaign), unless they're done well (source: a Robin Hood style character in a campaign where we just used the Xanathar's rules, so the stealing only took like two minutes).

I'm not familiar with modules so I don't know which ones cater to which types. Unlike the above post, I am a notorious, serial rogue player so that's generally my go-to.

That said, it's highly subjective to your own preferences. When you play RPG's, what's your go-to archetype? Some run and gun, sword and board, cast and smash. Others like myself, go into crouch mode and experience the world at a slower pace. So... I steal things a lot.

Lysandre, because I'm too much of a Pokemon fan not to have this be a thing.

I would choose the character you think you would enjoy playing the most. You could get all kinds of wierd advice when you ask a bunch of strangers on the internet what to do.

It really depends on your DM, how much they're willing to adapt for your backstory and so forth. However, there is no natural tie in for your backstory with the first two in DoIP. There's just nothing to bind them together. The DM might homebrew all in and that's fine...but you're not doing them any favours in that regard! So you'd potentially have to be happy with your backstory being mostly flavour. You'll also have to work to find motivation - the plot is mostly driven by the idea of the party doing freelancing work. Maybe the Clockwork Sorcerer could fit in? It wouldn't be a perfect fit, but you could make it work. I'm not sure someone seeking to be the King of Thieves would normally stick around..

That said, the last one has more going for it. Now, the biggest tie in isn't actually DoIP. Instead, there is an aspect of the follow up series, the Beyond Icespire Peak Trilogy. I can't remember which book exactly, but there is an aspect that would tie in quite nicely, if the DM wants to - and wants to buy and play the follow up books that takes the party from L7 (the end of DoIP) up to L13. They're an alright series, I mostly liked them because they were free at the time (which they've stopped doing) and topped up the Essentials Kit to a full adventure.

However, even without that, I feel like that character would be a more natural fit. Even if we assume that backstory is just for flavour etc, if he's at the beginning of his career with his Patron, he could just be looking for some work to help develop his talents and so willing to do some freelancing. I'm less convinced that the others would naturally do that.

Of course, this is just some points that might need to be considered. If the other characters grab you, then crack on with them. If you're not into the motivation aspect and not bothered about an involved backstory coming into play...then there's no reason why you can't play the King-of-Thieves-wannabe, or the Sorcerer-Servant-of-Mechanus. It won't break anything.