As long as it is still a Roth IRA, you should be good. Which it should be - there is no mechanism for rolling over a Roth IRA balance to a tIRA other than recharacterizations which only work on very recent contributions or to undue a recent Roth conversion.
slappy - a self-directed IRA allows you to invest in different investments like real estate or notes, whereas with a typical brokerage IRA, you only have access to the funds / stocks / whatnot that broker offers.