I get to vote in my very first US election next month (all the primaries in Texas are on March 3rd, not just the one for president). We'll see how voting machines compare to the good old paper ballots they use in Canada.
The biggest difference, though, is the huge number of elections going on. I have to figure out who to vote for in the US senate primary, the state house primary, the board of education primary, the railway commission primary (despite it's name, the Texas Railroad commission has absolutely nothing to do with railways but rather deal with regulating the oil and gas industry) and various judicial primaries. No US House primary (my district has a Democratic incumbent who is running unopposed in the primaries) or state senate primary (my state senator got elected to a four year term during the midterms - in Texas during the midterms half the senators get elected to two year terms and the other half to four year terms, determined by lottery).