i host myself with 2 fixed IPs from telekom germany business, its not as expensive as one might expect, under 90€ for a fiber and vdsl line, so next to hosting your own auth ns servers and mail you get failover at home which is nice.

Deutsche Telekom is well known as one of the worst ISPs due to their peering policy. Basically all traffic in or out of DT to/from another ISP is either paid by that ISP at extortionate rates, or takes circuitous routes to avoid paying extortionate rates. For this reason I believe they should be boycotted.

This is a common pattern for ex-national carriers in many countries btw - they believe they should be paid by both sides for all traffic that traverses their network, not just by one side, because they feel like they are God of the Internet in that country.